indd-utils/docs/format/preferences.md

Preferences

Document preferences are chunks of the preferences object (class 0x2202, one per document). The converter reads them in src/model/prefs.rs and writes them to Resources/Preferences.xml and designmap.xml. Values it does not read stay as observed (idml-values.md).

Evidence. Each field was compared with the IDML of every corpus pair (654 pairs, 495 of them trustworthy; docs/measurement.md). The counts below are pairs whose IDML has the value the field gives. Where a pair disagrees, it is a stale pair unless stated. The layouts are those of InDesign 7 (CS5) to 21, the versions the pairs show; the converter reads them for little-endian files of version 7 and later only.

Booleans stored as a u16 are 0 (false) or 1 (true). Several of them are chunks that only some documents have; a document without the chunk has the value given as "absent".

Colour settings (Document in designmap.xml)

Chunk	Layout	IDML
0x7C44 (12 bytes)	Three four-character codes, each stored reversed. The first is off in all 654 files. The second is the RGB policy, the third the CMYK policy	RGBPolicy, CMYKPolicy
0x7C04	u16 0, u32 n, n UIDs of profile objects (class 0x7D03), u32 6, then 6 UIDs: the RGB working profile, the CMYK working profile, and four more	RGBProfile, CMYKProfile
0x7C08 (6 bytes)	u16 at 2: rendering intent	SolidColorIntent, AfterBlendingIntent, DefaultImageIntent

Policy codes (as read, reversed): off ColorPolicyOff, pres PreserveEmbeddedProfiles, pdil CombinationOfPreserveAndSafeCmyk, conv ConvertToWorkingSpace. Both policies match in 495 of 495 trustworthy pairs and 654 of 654 pairs.

A profile is the in-object string at offset 1 of chunk 0x13C of its 0x7D03 object (U.S. Web Coated (SWOP) v2, sRGB IEC61966-2.1, ...). UID 0 is written $ID/. Matches: RGB 495 of 495 trustworthy and 653 of 654 pairs, CMYK 495 of 495 and 654 of 654. The profile names are stored in the INDD, so they describe the document, not the computer that exported it.

Intent codes: 11 UseColorSettings (136 files), 0 Perceptual (1 file), 2 RelativeColorimetric (1 file). The 516 files without the chunk all have UseColorSettings. In every file the three intents are equal, so the one code is written for all three.

AccurateLABSpots is false in all 654 IDML files; no field for it was looked for. The converter writes false.

View (ViewPreference)

Chunk 0x1202 (56 bytes in all 654 files):

Offset	Type	Attribute
0	u32 unit	HorizontalMeasurementUnits
4	u32 unit	VerticalMeasurementUnits
8	u32 unit	TypographicMeasurementUnits
12	u32 unit	TextSizeMeasurementUnits
16	u32 unit	PrintDialogMeasurementUnits
20	u32 unit	LineMeasurementUnits and StrokeMeasurementUnits
24	f64	HorizontalCustomPoints
32	f64	VerticalCustomPoints
40	f64	CursorKeyIncrement
48	f64	PointsPerInch

Unit codes: 0x1201 Points, 0x1202 Picas, 0x1203 Inches, 0x1205 Millimeters, 0x1206 Centimeters, 0x120B Pixels, 0x5101 Ha, 0x510F Q. Every field matches 495 of 495 trustworthy pairs; the horizontal, vertical, line and stroke units match 653 of 654 pairs (one stale pair differs).

Ruler origin. Chunk 0x808 (u16) is RulerOrigin: 0 SpreadOrigin, 1 PageOrigin, 2 SpineOrigin. Over the 1,556 distinct corpus files with an IDML (stale pairs included), all 51 with the chunk match (22 SpreadOrigin, 28 PageOrigin, 1 SpineOrigin); in the 1,252 trustworthy pairs, 35 of 35 (20 and 15). Without the chunk, 1,492 of 1,505 files have SpreadOrigin (1,209 of 1,217 trustworthy pairs). The other 13 (8 trustworthy, InDesign 8.0 to 21.2) have PageOrigin, and no field was found that separates them (unknowns.md). The converter writes SpreadOrigin without the chunk. Guide locations depend on the origin (objects.md, guides).

Flags in their own chunks

Chunk	Attribute	Absent	Matches (trustworthy, all)
0x593	ViewPreference ShowFrameEdges	true	490 of 495, 649 of 654
0x803	ViewPreference ShowRulers	true	493 of 495, 642 of 654
0x56A	GridPreference BaselineGridShown	false	495 of 495, 654 of 654
0x569	GuidePreference GuidesLocked	false	495 of 495, 654 of 654
0x56B	DocumentPreference ColumnGuideLocked	true	495 of 495, 654 of 654
0xCAC7	TextPreference ShowInvisibles	false	495 of 495, 654 of 654

Every file with the chunk matches. The mismatches are files without it whose IDML has the other value (5 and 12 files), so these two settings are stored somewhere else as well in some documents; that place is not known.

More u16 flags, over the corpus of 2026-10 (1,460 pairs, 1,251 of them trustworthy). Every file with the chunk matches; "absent" gives the value of every file without it.

Chunk	Attribute	With the chunk	Absent
0x566	GridPreference DocumentGridShown	122 of 122 (7 true)	false, 1,338 of 1,338
0xCAF3	TextPreference EnableStylePreviewMode	115 of 115 (11 true)	false, 1,345 of 1,345
0xCD1D	CjkGridPreference ShowAllFrameGrids	90 of 90 (45 true)	true, 1,370 of 1,370
0xCD1E	CjkGridPreference ShowCharacterCount	103 of 103 (60 true)	true, 1,357 of 1,357
0xCD14	CjkGridPreference SnapToLayoutGrid	1,460 of 1,460 (every file has it)
0xCD1C	CjkGridPreference ShowAllLayoutGrids	1,460 of 1,460 (every file has it)
0xCA62	TextPreference HighlightHjViolations	63 of 63 (4 true)	varies
0xCAD3	TextPreference HighlightCustomSpacing	57 of 57 (1 true)	varies
0xCAD4	TextPreference HighlightSubstitutedGlyphs	57 of 57 (4 true)	varies

Without one of the three highlight chunks, IDML has false in all but 4 or 5 files, which have no highlight chunk at all and every highlight on in IDML (or are one collection with other values); no stored value separates them. The converter writes false without the chunk, as for the flags above: 1,247, 1,246 and 1,246 of 1,251 values in the trustworthy pairs of the corpus after 2026-10 (HighlightHjViolations, HighlightCustomSpacing, HighlightSubstitutedGlyphs), where it had 56, 52 and 52 from the chunk alone. The exceptions are those files. HighlightKeeps and HighlightSubstitutedFonts have no chunk; the converter writes false and true as defaults (idml-values.md, defaults).

Document setup (DocumentPreference)

Chunk 0x533 (146 bytes) also holds the page size, facing pages, intent and page binding (objects.md, document preferences). Its bleed and slug offsets are rectangles in the order inside (left), top, outside (right), bottom:

Offset	Type	Attribute
70, 78, 86, 94	f64	DocumentBleedInsideOrLeftOffset, …TopOffset, …OutsideOrRightOffset, …BottomOffset
102	u8	DocumentBleedUniformSize
104, 112, 120, 128	f64	SlugInsideOrLeftOffset, SlugTopOffset, SlugRightOrOutsideOffset, SlugBottomOffset
136	u8	DocumentSlugUniformSize

In the 645 files with the 146-byte chunk, 42 have bleeds that are not all equal. The inside and outside bleeds match only at 70 and 86 (645 of 645 files but one stale pair), and the slugs: inside only at 104, bottom only at 128. No sample has top and bottom bleeds that differ, or top and outside slugs that differ; the order of those pairs follows the order the other fields show. Uniform flags: 645 of 645 files (DocumentBleedUniformSize false in 42, DocumentSlugUniformSize true in 3).

The 126-byte chunk. Files saved by InDesign 7.0 and 7.5 have a 126-byte chunk 0x533: 16 bytes before the page size, and the fields from the facing pages flag on 20 bytes earlier than in the 146-byte chunk:

Offset	Field	146-byte offset
16, 24	f64 page width, height	0, 8
32	u8 intent (equal to the u32 at 122)
38	u8 2 facing pages, 1 not	58
44	u16 page binding	64
50, 58, 66, 74	f64 bleeds	70–94
82	u8 DocumentBleedUniformSize	102
84, 92, 100, 108	f64 slugs	104–128
116	u8 DocumentSlugUniformSize	136
122	u32 intent	142

Evidence: the 11 pairs of the corpus of 2026-10 with this chunk (9 trustworthy): page size 11 of 11 (5 sizes), intent 11 of 11 (3 web), facing pages 11 of 11 (3 facing), binding 0 and LeftToRight in 11, bleeds 11 of 11 (all four 8.504 in 3, 0 in the others), uniform bleed true and uniform slug false in 11, slugs all 0. As the four bleeds are equal in every sample, their order follows the 146-byte chunk.

Grids (GridPreference)

Chunk 0x55F (36 bytes in all 654 files): f64 at 2 BaselineDivision, f64 at 10 BaselineStart, f64 at 18 the view threshold as a fraction (BaselineViewThreshold is it times 100). 654 of 654 pairs each.

Chunk 0x545 (16 files): f64 at 8 HorizontalGridlineDivision, u32 at 16 HorizontalGridSubdivision, f64 at 20 VerticalGridlineDivision, u32 at 28 VerticalGridSubdivision; 16 of 16. Without the chunk the values follow the edition (values of the exporting edition, below): 20 mm (56.69291338582678) and 10 after a last session with code 0x0101, else 72 and 8.

Watermark (WatermarkPreference in designmap.xml)

Chunk 0x16344 (621 files): from offset 10, the font family and the font style, each a u32 length in code units followed by text segments, then u32 point size and u32 UID of an interface colour (objects.md, interface colours), written as WatermarkFontColor. Family, style and size match 621 of 621. In files without the chunk the font follows the language of the assignment name (values of the exporting edition, below); the other values are the observed ones.

Text defaults (TextDefault)

Chunk 0x23F of the preferences object is a text attribute list in the layout of a style's list (u16 count, then records; attributes.md). The converter writes it as TextDefault with the same attribute table as styles. Over all pairs this reproduces 182,742 of 196,543 TextDefault values, against 159,982 from the observed values alone; no attribute reproduced before is lost. As for paragraph styles, KerningValue is left out: the schema does not allow it there. The IDs of KeepFirstLines, ParagraphBorderType, RubyFont and the others found in the corpus of 2026-10 are in every list where IDML has the attribute (attributes.md, more paragraph and character attributes): each is reproduced in 1,251 of 1,251 trustworthy pairs (ParagraphBorderType 918 of 918 and ParagraphShadingOverprint 1,032 of 1,032, the pairs whose IDML has them).

Text (TextPreference, TextFramePreference)

Chunk 0x280 (174 bytes in InDesign 7, 212 in 8 to 14, 214 from 15):

Offset	Type	Attribute
0	f64	SmallCap
8, 16	f64	SuperscriptSize, SubscriptSize
24, 32	f64	SuperscriptPosition, SubscriptPosition
40	f64	TextFramePreference TextColumnGutter
88	f64	LeadingKeyIncrement
96	f64	BaselineShiftKeyIncrement
104	f64	KerningKeyIncrement divided by 1000
112	u32	TextFramePreference TextColumnCount
118	u8	TypographersQuotes
130	u8	LinkTextFilesWhenImporting
142	u8	TextFramePreference FirstBaselineOffset: 0 LeadingOffset, 1 AscentOffset, 2 CapHeight, 3 EmboxHeight, 4 XHeight
162	u8	UseParagraphLeading
184	u8	QuoteCharactersRotatedInVertical (212 bytes and more)
212	u8	ShapeIndicAndLatinWithHarbuzz (214 bytes)

Each matches all 654 pairs that have the attribute (288 for the last, 645 for the one before), and the two positions match each other's attribute too, except where the files show different values: positions differ in 2 files, which tells 24 from 32; the sizes are equal in every file, so 8 and 16 follow the order of the positions. Offsets 168 and 170 match both UseCidMojikumi and UseNewVerticalScaling, which are equal in every file. In the corpus of 2026-10 the two bytes are equal to each other and to both IDML values in 803 of 803 pairs (161 true, 642 false). Which byte is which is not known, so the converter writes both attributes only when the bytes are equal (0 false, 1 true).

Baseline frame grid colour. The BaselineFrameGridColor of the BaselineFrameGridOption preference follows an observed rule over stored data, not a decoded field. Over the 803 pairs of the corpus of 2026-10:

Stored data	Pairs	IDML colour
Chunk 0x2834 (24 bytes), u32 at 20 not 0: the UID of an interface colour object (as for layers, objects.md)	11	that colour (Charcoal in all 11)
u32 at 20 is 0, offset 168 of chunk 0x280 is 1	154	Charcoal
u32 at 20 is 0, offset 168 is 0	513	LightBlue
No chunk 0x2834 (offset 168 is 0 in all)	125	LightBlue

No stored field was found that holds the colour when the u32 is 0. Both the colour and offset 168 appear to be defaults of an edition. In the corpus of 2026-10 offset 168 is 1 exactly when the first session of the save history is of a Japanese or Chinese edition, while the IDML colour follows the last one; the converter uses the rule of the exporting edition (below) where the u32 is 0. Every object style's BaselineFrameGridColor equals the preference's in 803 of 803 pairs (3,515 object styles), so the converter writes this colour in the preference and in every object style. A UID that is not an interface colour, or another byte at 168, leaves the observed value (LightBlue).

Chunk 0x28BE (14 bytes, 16 from InDesign 18), u8 flags: 4 SmartTextReflow, 6 LimitToMasterTextFrames, 8 DeleteEmptyPages, 10 PreserveFacingPageSpreads, 12 SmartTextReflowSync (16 bytes). 620 of 620 files with the chunk (283 of 283 for the last). The 34 files without it have SmartTextReflow="false" and LimitToMasterTextFrames="true"; in the corpus of 2026-10 the 60 files without it also have DeleteEmptyPages and PreserveFacingPageSpreads false (60 of 60).

Story orientation. Byte 116 of chunk 0x280, after TextColumnCount, is StoryPreference StoryOrientation: 0 Horizontal (1,349 files), 1 Vertical (111); 1,460 of 1,460 pairs of the corpus of 2026-10, every chunk length.

Chunk 0x3768 (4 or 6 bytes): u8 at 0 AbutTextToTextWrap, u8 at 2 ZOrderTextWrap, and in 6-byte chunks u8 at 4 HonourTextIndentsWithTextWrap (IDML has it only for those). Evidence: ZOrderTextWrap 654 of 654; the other two 489 of 489 and 139 of 139 trustworthy pairs.

Margins and columns of new pages (MarginPreference)

Chunk 0x550: f64 Left, Top, Right, Bottom at 0, 8, 16, 24 (528 of 528 files). The 126 files without it have 36 for all four.

Chunk 0x555: u32 ColumnCount at 0, f64 ColumnGutter at 4 (119 of 119), u16 at 12 the column direction: 0 Horizontal, 1 Vertical. Without it, ColumnCount is 1 (535 of 535) and ColumnGutter follows the edition (values of the exporting edition, below).

Column direction. DocumentPreference and MarginPreference ColumnDirection take the u16 at 12; without the chunk, they equal the StoryOrientation of the story settings (chunk 0x280, byte 116). With both rules the converter reproduces 1,249 of 1,251 values of each in the trustworthy pairs of the corpus after 2026-10 (75 of them Vertical). The 2 others have no chunk and a horizontal story orientation, but Vertical in IDML; no field was found for them.

Anchored objects (AnchoredObjectSetting)

Chunk 0x2800, as anchors and object styles have (objects.md, anchored object settings): every field matches in the 1,295 files with the chunk (1,134 trustworthy). The 165 files without it (117 trustworthy) have, in every file, AnchoredPosition="InlinePosition", SpineRelative="false", PinPosition="true", AnchorPoint="BottomRightAnchor", HorizontalAlignment="LeftAlign", HorizontalReferencePoint="TextFrame", VerticalAlignment="TopAlign", VerticalReferencePoint="LineBaseline" and both offsets 0. Object styles without the chunk (6 styles of versions 10.1 and 10.2) have the same values.

Pasteboard (PasteboardPreference)

Chunk 0x5D2: f64 horizontal and vertical margin at 0 and 8, written as PasteboardMargins; the vertical one is also MinimumSpaceAboveAndBelow. 130 of 130 files with the chunk; the 524 without it have -1 72 and 72, except one stale pair. Four u32 UIDs of interface colours follow; the IDML colours (LightGray, GridBlue) are not in the table of objects.md, so they are not written.

From DOM 9 the chunk has 34 bytes, and byte 32 is MatchPreviewBackgroundToThemeColor (4 true): 199 of 199 files with a 34-byte chunk. Without the chunk, IDML from DOM 9 has false (1,156 of 1,156 files of the corpus of 2026-10). The 32-byte chunk of DOM 7 and 8 has no such byte, and their IDML no attribute.

Story settings of new frames (StoryPreference)

Chunk 0x2EE of the preferences object (16 bytes) has the layout of the story chunk 0x2EE (objects.md, story settings): u16 at 12 OpticalMarginAlignment, u16 at 14 FrameType (0 TextFrameType, 1 FrameGridType), f64 at 2 OpticalMarginSize. 197 of 197 files with the chunk, for each attribute. The u16 at 0 is 0 in all 197, also in documents with vertical stories; the orientation is in chunk 0x280 (above). Without the chunk, IDML has OpticalMarginAlignment="false" and FrameType="TextFrameType" (1,263 of 1,263), but OpticalMarginSize is 12 in 1,207 files and 9.2126 (13 Q) in 56. The text size unit separates them: without the chunk IDML has OpticalMarginSize="9.2125984251969" (13 Q, written with these digits) when ViewPreference TextSizeMeasurementUnits is Q (chunk 0x1202, above), and 12 otherwise. Stories without their chunk 0x2EE follow the same rule (objects.md, story settings). The converter writes the size by this rule: 1,251 of 1,251 values in the trustworthy pairs of the corpus after 2026-10 (1,079 of them without the chunk).

Text wrap of new page items (TextWrapPreference)

Chunk 0x3720 of the preferences object (40 bytes) is the page item text wrap chunk 0x3703 (objects.md, text wrap) without the path UID: u32 at 0 the wrap mode (0 None, 1 JumpObjectTextWrap, 3 BoundingBoxTextWrap, 6 Contour), f64 at 4, 12, 20 and 28 the left, top, right and bottom TextWrapOffset, and u32 at 36: 1 is ApplyToMasterPageOnly="false", 0 is true. Every attribute matches in the 42 files with the chunk (20 with mode 0 and true, 13 with mode 0 and false, 4 bounding box, 4 jump object, 1 contour). The 1,418 files without it have None, offsets 0 and false.

Chunk 0x373F (29 bytes) is the contour of new placed graphics, with the layout of the graphic chunk 0x373D (objects.md, text wrap, contour). Its type is the ContourType of the preferences' TextWrapPreference in the 4 trustworthy pairs (corpus of 2026-10) that have the chunk: type 5 SameAsClipping in 2, type 1 DetectEdges in 2. The 1,247 without it have SameAsClipping. Placed graphics without their own contour chunk take this one.

Other settings in their own chunks

Chunk	Attribute	Evidence (corpus of 2026-10)
0x42DB (i16)	MojikumiUiPreference MojikumiUiSettings, signed decimal (0x8000 is −32768)	92 of 92 (16384, 16383, 9729, −32768, 32767, 1); without the chunk 16383, 1,368 of 1,368
0x11C69 (u32 1)	TaggedPDFPreference (designmap) StructureOrder="UseArticles" and DictionaryPreference RecomposeWhenChanged="false"	2 of 2; without the chunk UseXMLStructure (1,448 of 1,448 IDML files that have the element) and true (1,458 of 1,458)
0x1BC0B	XMLImportPreference CreateLinkToXML	u32 count of key and value pairs, each a u32 length in UTF-16 units and text segments; key XMediaUI_CreateLink with value 1 is true (1 file, 10 pairs); count 0 is false (1,459 of 1,459)

StructureOrder and RecomposeWhenChanged differ from the common values only in the same two documents (one collection, version 20.5), which are also the only files with chunk 0x11C69. Which of the two the chunk stores is not known; the converter writes both from it. The other keys of chunk 0x1BC0B (XMediaUI_RunXSLTScriptEnabled, XMediaUI_PreserveStoryTextStyling and more) occur only in that one file, whose other XMLImportPreference values are the common ones, so they are not mapped.

Tagged PDF. Every IDML from version 7.5 has a TaggedPDFPreference in designmap.xml (1,450 of 1,450 files), none of version 7.0 (0 of 10); the converter writes it from 7.5.

Default XML tags (XMLPreference)

Chunk 0xBF4F: five entries, each a name (u32 length, text segments) and the u32 UID of an interface colour: the story, table, untagged ([None], not in IDML), cell and image tags. DefaultStoryTagName, DefaultTableTagName, DefaultCellTagName and DefaultImageTagName match 654 of 654; the names are in the language of the InDesign that made the document (Story, Article, Textabschnitt, ...). The colours are written as Default…TagColor.

Grids in back

Chunk 0x567 (u16, 53 files): GridPreference GridsInBack; 53 of 53. The 601 files without it have true.

Page item defaults (PageItemDefault, FrameFittingOption)

The object of class 0x6E07 has a chunk 0x6E07: u32, u32, u32 n, n 12-byte entries, then a page item attribute list (u32 count, records; attributes.md), then u32, u32, u32 m and m entries of the same layout. An entry is u32 class, u32 UID, u32 UID. In every sample the first table has entries for classes 0x1F05 (colour), 0x5503 (gradient), 0x5533, 0x6E0B (None) and 0x6E11. The entries name the unnamed colours and gradients that IDML writes though nothing refers to them (objects.md, colours). The list has the attribute IDs of page items. Written with the page item attribute table, it gives PageItemDefault StrokeWeight in 628 of 628 files in which an analysis script found the list; over all pairs the converter reproduces StrokeWeight, CornerRadius and MiterLimit of every file.

The frame fitting attributes of the list (objects.md, frame fitting) are the preference FrameFittingOption. IDML writes all seven in every file; the list often lacks some (AutoFit in 1,126 of the 1,251 trustworthy pairs, the crops in 1,125, FittingAlignment in 93), and an attribute the list lacks has code or number 0 in IDML: AutoFit="false" (1,126 of 1,126), crops 0, FittingOnEmptyFrame="None" (1,123 of 1,123) and FittingAlignment="TopLeftAnchor" (93 of 93). Where the list has the attribute, IDML has its value. The converter reproduces each of the seven attributes in 1,251 of 1,251 trustworthy pairs (all 1,460 pairs: AutoFit absent and false in 1,324, FittingOnEmptyFrame None in 1,321, FittingAlignment TopLeftAnchor in 107).

The page item attributes of the list also give the stroke attributes of PageItemDefault (attributes.md, strokes): StrokeTint, GapColor, GapTint, EndCap, EndJoin, the line ends and ArrowHeadAlignment, each reproduced in every trustworthy pair whose IDML has it.

The list has five more IDs that PageItemDefault has (1,460 of 1,460 files; values over all pairs):

ID	Attribute	Values
0x551E	GradientFillAngle	f64; 90 in 5 files
0x5524	GradientStrokeAngle	f64; 90 in 4 files
0x6E78	Nonprinting	u16 bool; true in 1 file
0x6E95, 0x6E96	LeftArrowHeadScale, RightArrowHeadScale	f64; 100, and 80 in one file (both)

The two gradient angles are told apart by one file with fill angle 90 and stroke angle 0. The two arrowhead scales are equal in every file, so which ID is which is assumed from their order; the IDs are in the list exactly where IDML has the attributes (1,159 files, from version 12.0 on). The line end code 0x5A0C is SquareSolidArrowHead (5 files).

The overprint IDs 0x6E67, 0x6E6A and 0x6E8B are 0 in every list. IDML writes them by the rule of object styles (objects.md, object style overprint): OverprintStroke, OverprintFill and OverprintGap where the list's stroke, fill or gap colour carries ink, and all three in documents saved by 21.4 or later. Over all 1,462 pairs, 4 lists have a stroke colour that carries ink (Color/Black and process colours) and none a fill or gap colour that does (one gap colour is Paper); with the 12 documents of 21.4 and 21.5 this gives 16 OverprintStroke and 12 OverprintFill and OverprintGap values, every one false as in the IDML, and no extra value.

Print settings (PrintPreference, PrintBookletPrintPreference)

Chunk 0xA4C holds the print settings and chunk 0xAF2 those of booklet printing. Both have one layout: a head of fields and strings, seven fixed blocks (A to G) with strings between them, and a tail. All 1,308 chunks of the 654 pairs (DOM 7 to 21) parse with it, with the same block lengths. A "string" is a flag byte (1 for a built-in key, 0 for plain text; 2 and 3 also occur) and an in-object string. Booleans are u8: 1 true, 0 false. A code not listed leaves the attribute out.

Head

Field	IDML
u8 1 if a print record follows, u8, u32 length n, n bytes	PrintRecord: $ID/ and the bytes in base64, 76 characters per line
With a record: u16 0, u32. Without: 2 bytes	DeviceType: the u32 in decimal; 0 without a record
String	ActivePrinterPreset: built-in kPrSt_DefaultName is Default, built-in empty Custom (enumerations), otherwise the name (string)
u32	PrintTo; PrintToDisk is true when it is 2
String	Printer: built-in kPrepress File is the enumeration PostscriptFile, built-in empty the string $ID/, otherwise the name
String	not identified (built-in empty in every file)
String	PPD: built-in kDevice Independent is the enumeration DeviceIndependent when the printer is kPrepress File, otherwise the string $ID/kDevice Independent; built-in empty the string $ID/; otherwise the name
String	PPDFile ($ID/ and the text for a built-in string)
u32	PostScriptLevel: 2 Level2, 3 Level3
f64	PrintResolution
4 f64	PaperSizeRect: left, top, right, bottom
4 f64	ImageablePaperSizeRect: left, top, right, bottom
i32, then a string	PaperSize: −3 the string, −2 DefinedByDriver, −1 Custom

IDML ends the base64 text with a line feed when its last line is full (76 characters). This holds for PrintRecord and PaperSizeSelector.

Blocks

"A+8" is offset 8 in block A.

Part	Field	IDML
A (126 bytes)	f64 at A+8 and A+16	PaperWidthRange ("min max")
	f64 at A+32 and A+40	PaperHeightRange
	f64 at A+56 and A+64	PaperOffsetRange
	u16 at A+84	PrintPageOrientation: 0 Portrait, 1 Landscape
	u32 at A+104	Copies
	u8 at A+118	PrintBlankPages
	u16 at A+122	Properties/PageRange: 0 AllPages; 2 none (below)
String	page range text (empty, or text such as 1-2)	not mapped
B (30 bytes)	u8 at B+4	PrintSpreads
	u8 at B+6	ColorOutput: 0 CompositeGray, 1 CompositeRGB, 2 CompositeCMYK, 5 CompositeLeaveUnchanged
	u8 at B+10	TextAsBlack
	f64 at B+14, B+22	CompositeAngle, CompositeFrequency
String		CompositeScreening: $ID/ and the key for a built-in string, else the text
String		SeparationScreening, same rule
C (25 bytes)	u8 at C+0	ScaleMode: 0 ScaleToFit, 1 ScaleWidthHeight
	u8 at C+4	ScaleProportional
	f64 at C+6, C+14	ScaleWidth, ScaleHeight
	u8 at C+22	PagePosition: 0 UpperLeft, 3 Centered
String		not identified (plain and empty in every file)
D (48 bytes)	u8 at D+0	0: Tile and Thumbnails false; 1: Tile true; 2: Thumbnails true
	f64 at D+8	TilingOverlap
	u8 at D+16	ThumbnailsPerPage: 2 K1x2, 4 K2x2, 9 K3x3
	u8 at D+20	SendImageData: 0 AllImageData, 1 OptimizedSubsampling
	u8 at D+24	DataFormat: 0 Binary, 1 ASCII
	u16 at D+30	BitmapResolution
	u8 at D+42	FontDownloading: 0 None, 1 Complete, 2 Subset
	u8 at D+46	DownloadPPDFonts
String		MarkType (enumeration): built-in empty Default, built-in kJMarksWithCircle JMarkWithCircle after a last session with code 0x0101, else Default (values of the exporting edition, below)
E (72 bytes)	u8 at E+0	MarkLineWeight: 1 P25pt, 2 P50pt, 4 P07mm, 5 P10mm
	f64 at E+4	MarkOffset
	u8 at E+12, 14, 16, 18, 20	CropMarks, PageInformationMarks, ColorBars, RegistrationMarks, BleedMarks
	u8 at E+22	UseDocumentBleedToPrint
	f64 at E+24	BleedTop
	u8 at E+32	BleedChain
	f64 at E+34, E+42, E+50	BleedInside, BleedBottom, BleedOutside
	u8 at E+58	IncludeSlugToPrint
	u8 at E+68	Profile (enumeration): 1 UseDocument, 0 PostScriptCMS
String, F (4 bytes), string		not identified (built-in empty strings in every file)
G (98 bytes)	f64 at G+12, G+20	CyanFrequency, CyanAngle
	f64 at G+30, G+38	MagentaFrequency, MagentaAngle
	f64 at G+48, G+56	YellowFrequency, YellowAngle
	f64 at G+66, G+74	BlackFrequency, BlackAngle
	f64 at G+82, G+90	SpotFrequency, SpotAngle
String		FlattenerPresetName: $ID/ and the key for a built-in string; flag 3 with [High Resolution] (or its Czech name, [Vysoké rozlišení]) is $ID/kFlSt_HighDefaultName; other names are left out
Tail	6 zero bytes, u32 n, n bytes, then u16 (DOM 7 to 9) or u32 (DOM 10 on), 0 or 1	PaperSizeSelector: $ID/ and the n bytes in base64, as PrintRecord

Also in every block are f64 −1 at A+0 and A+24 (PaperWidth and PaperHeight are Auto in every file). The other bytes of the blocks are not mapped: the IDML attributes left (Collating, Sequence, Trapping, PrintCyan, Intent, …) have one value in every file, so they cannot be told apart.

Three attributes are derived from fields:

• AllPrinterMarks is true exactly when the five marks of block E are all true (PrintPreference: 2 of 2 true, 487 of 487 false; booklets: 5 of 5 and 484 of 484).
• PreserveColorNumbers is false when ColorOutput is CompositeRGB and true otherwise. Two of the 37 documents with CompositeGray have false.
• PrintToDisk (above).

The page range of PrintPreference is the u16 at A+122. With 0 the IDML has Properties/PageRange AllPages (enumeration), with 2 it has no PageRange: 1,240 and 12 of the 1,252 trustworthy pairs (DOM 11.4 to 21.3 for the 12), and no other value occurs. The page range text does not follow it: it is empty in 1,062 of the 1,240, and holds other text (1, 2-3, All Pages, A5 V) in the others and in all 12. The converter writes AllPages for 0 and nothing otherwise.

TilingType has no field; the converter writes Auto as a default (idml-values.md, defaults).

BitmapPrinting is not stored: no byte of any chunk of the preferences object (0x2202) or of the document object, nor of the print record, follows it. The converter does not write it.

PrintBookletPrintPreference has no PrintSpreads, Thumbnails, Tile, TilingOverlap, ThumbnailsPerPage, IncludeSlugToPrint or PageRange (schema); the converter reads the fields and does not write these.

Evidence: each attribute above was compared over the 489 trustworthy pairs for both elements; every one matches in all 489, except PreserveColorNumbers (487, the two CompositeGray documents) and MarkType (488: one DOM 16.1 document stores kJMarksWithCircle and its IDML has Default; in the corpus of 2026-10 every document with code 0x0100 that stores it has Default, 140 and 175 of each element). Over all 654 pairs, the only further misses are PPDFile of two stale booklet pairs (a built-in path written without $ID/). The paper rectangles are written as IDML writes them: with the digits of the shortest form that reads back, the last rounded half to even from the exact value (583.2000122070312, not …313). Several ranges and rectangles are f32 values widened to f64 (16.600000381469727); they match only when written in full.

Which of two equal fields is which is assumed, because they are equal in every sample: CyanFrequency and MagentaFrequency (the stride of the ink entries supports the order), ScaleWidth and ScaleHeight, and BleedTop, BleedInside and BleedOutside.

Booklet options (PrintBookletOption)

Chunk 0xAF0 of the preferences object: u32, a string (a page range or paper name, not mapped), 4 bytes, then f64 TopMargin, BottomMargin, LeftMargin, RightMargin, then 34 bytes (AutoAdjustMargins and the other attributes have one value in every file). The chunk is in 11 trustworthy pairs (12 of all pairs); the margins match in all of them. Without the chunk, IDML has the margins 36 (478 of 478; 1,447 of 1,447 in the corpus of 2026-10). Left and right are equal in every sample, so their order is assumed.

Index header setting (IndexHeaderSetting)

Chunk 0x1300E of the preferences object holds the attributes of IndexHeaderSetting and its Properties/ListOfIndexHeaderGroup. Every trustworthy pair has the chunk. A "u32 string" is a u32 length in UTF-16 units, then text segments.

Field	IDML
String	HeaderSetName ($ID/ and the text for a built-in string)
u16	HeaderSetLanguage
u32	IndexHeaderSetHandler
u32	IndexHeaderSetGroupValue
u32	IndexHeaderSetGroupOptionValue
u16	not identified (1)
u32	number of groups

Each group is an IndexHeaderGroupType:

Field	IDML
String	InternalName ($ID/ and the text for a built-in string)
String	UIString (same rule)
u32 string	DocumentString, written $ID/ and the text
u16	Visibility: 1 true, 0 false
u32	number of sections

Each section is a SectionHeaderType in the group's SectionHeaderArray:

Field	IDML
u32 string	SortingHeaderString, written $ID/ and the text
u32 string	DocumentHeaderString, written $ID/ and the text
String	UIHeaderString ($ID/ and the text for a built-in string)
u16	Language

The chunk ends after the last section. Evidence: the five attributes and the whole list equal the IDML in 489 of 489 trustworthy pairs; the parse reads every chunk of the 654 pairs to its end. The default list has two groups (kIndexGroup_Symbol with one section, $ID/IDX_Basic with 26); documents with CJK index groups have more.

Index options (IndexOptions)

Chunk 0x13010 of the preferences object, in 10 of the 489 trustworthy pairs and in no stale pair:

Field	IDML
u32 string	Title
String	TitleStyle (a paragraph style name, below)
u8	ReplaceExistingIndex (1 true)
u8	IncludeBookDocuments
String	not identified (empty in every file)
14 bytes	byte 10: IncludeSectionHeadings; the rest 0
6 u32 strings	FollowingTopicSeparator, BetweenPageNumbersSeparator, BetweenEntriesSeparator, BeforeCrossReferenceSeparator, PageRangeSeparator, EntryEndSeparator
8 strings	Level1Style to Level4Style, SectionHeadingStyle (paragraph styles), PageNumberStyle, CrossReferenceStyle, CrossReferenceTopicStyle (character styles)
4 bytes	0

• The en dash (U+2013) stored as PageRangeSeparator is written ^= (10 of 10 pairs match).
• A style is stored by name. IDML names the style of that name that is in no style group, whatever the built-in flag of the stored name. If there is none, IDML writes ParagraphStyle/$ID/[No paragraph style] (CharacterStyle/$ID/[No character style]). Examples: a stored built-in Index Level 1 in a document without that style gives the root style; a stored built-in Index Section Head gives ParagraphStyle/Index Section Head where a user style of that name exists; a stored name equal to a style inside a style group gives the root style.

Evidence: every attribute in 10 of 10 trustworthy pairs (titles in several languages, ReplaceExistingIndex false once, IncludeSectionHeadings false once, user style references).

Without the chunk every IDML of the corpus of 2026-10 (1,392 of 1,392) has TitleStyle, Level1Style to Level4Style and SectionHeadingStyle ParagraphStyle/$ID/[No paragraph style], PageNumberStyle, CrossReferenceStyle and CrossReferenceTopicStyle CharacterStyle/$ID/[No character style], ReplaceExistingIndex="true", IncludeBookDocuments="false", IncludeHiddenEntries="false", IndexFormat="NestedFormat", IncludeSectionHeadings="true", IncludeEmptyIndexSections="false", and the separators (two spaces, following topic), ^= (page range), , (between page numbers), . (before a cross reference) and the empty end separator. The converter writes these. The title is Index in most documents and a translation in the others (索引, Indice, Указатель, …), and BetweenEntriesSeparator is ; or 、. Both follow the edition (values of the exporting edition, below).

Chapter numbering (ChapterNumberPreference)

Chunk 0x1A4C4 of the preferences object (14 bytes), in 37 of the 489 trustworthy pairs:

Offset	Field	IDML
0	u32	ChapterNumberFormat (string): 0x1A477 1, 2, 3, 4..., 0x1A47A A, B, C, D..., 0x1A479 i, ii, iii, iv..., 0x1A473 001,002,003...
4	u32	ChapterNumberSource: 1 UserDefined, 3 ContinueFromPreviousDocument
8	u32	ChapterNumber
12	u16	not identified

Evidence: 37 of 37. Without the chunk, IDML has ChapterNumber="1", ContinueFromPreviousDocument and 1, 2, 3, 4... in 452 of 452 (1,345 of 1,345 in the corpus of 2026-10); the converter writes the element with these values.

Dictionary (DictionaryPreference)

Chunk 0x2806 of the preferences object (6 bytes, the same in every file). Without it, Composition is Both (468 of 468 trustworthy pairs). With it, Composition is UseDocument in 16 of 21; the other 5 (DOM 14 and 15) have Both with the same bytes. The converter writes UseDocument when the chunk is there.

EPUB, HTML and Publish Online export

From DOM 8 for EPUB and HTML, DOM 10 for fixed layout EPUB, DOM 11 for Publish Online (designmap.xml). Each has a chunk of the preferences object that only some documents have; values are from the corpus of 2026-10 (1,460 pairs, 1,251 trustworthy). A "string" here is a flag byte and an in-object string; for TocStyleName, ParagraphStyleName and CoverPage, flag 1 means $ID/ before the text.

EPubExportPreference, chunk 0x21A1A (39 files, 37 trustworthy), read in order:

Field	IDML
u32	Version: 0 Epub2, 1 Epub3
u32	ExportOrder: 1 LayoutOrder, 2 ArticlePanelOrder
u32	EpubCover: 0 None, 1 FirstPage, 2 ExternalImage
string	CoverImageFile
u16	1 in all (not mapped)
string	TocStyleName; UseTocStyle is true exactly when its text is not empty (11 true, 28 false)
u16	BreakDocument
string	ParagraphStyleName
46 bytes	not mapped
string	EpubPublisher
string	Id
50 bytes (52 in the DOM 8 file, which has 2 more first)	u16 at 0: G (below); u16 at 2: ImageExportResolution in ppi (72 Ppi72, 150 Ppi150); u16 at 6: CustomImageSizeOption (0 SizeFixed, 1 SizeRelativeToTextFlow)
string	empty in all
20 bytes (INDD 8 to 10, 18 files), 22 (13.x, 4) or 26 (17 on, 17)	u16 at 10 (at 14 in the 26-byte block): EmbedFont
6 strings, not in the DOM 8 file	EpubTitle, EpubCreator, EpubDate, EpubDescription, EpubRights, EpubSubject

G = 1 gives PreserveLayoutAppearence="true", FootnotePlacement="FootnoteAfterStory" and UseExistingImageOnExport and UseOriginalImageOnExport false; G = 0 gives false, FootnoteInsidePopup, true and true. The four change together in all 39 files (one collection of 10 has 0), so they are written as a group, for these codes only. Which length the two blocks have is not stored; the converter reads the layout that ends exactly at the chunk's end (one of the six combinations does in all 39 files). Every attribute matches in 39 of 39 files. A chunk that no combination reads to its end gives only Version and Id (the string that starts with urn:uuid:). The u16 at 0 of the 20- to 26-byte block is 5 in all files, as is IDML Level; it is not mapped.

HTMLExportPreference, chunk 0x21A19 (7 files, all trustworthy): u32 at 4 ExportOrder (as above), u16 at 48 ViewDocumentAfterExport, u16 at 54 PreserveLayoutAppearence; after byte 98: a string, 6 bytes (10 in the file of InDesign 17), two strings, a u16 and the u16 PreserveLocalOverride. 7 of 7 each. The second of the two strings is .jpg in all 7, as is IDML ImageExtension; it is not mapped.

EPubFixedLayoutExportPreference, chunk 0x21A25 (18 files, all trustworthy), in order: u32 EpubCover; string CoverImageFile; u16; string TocStyleName; u16; string EpubPublisher; string Id; 16 bytes; a string (empty in all); 12 bytes; the six metadata strings above, then a string empty in all (IDML EpubPageRange is empty in all, so it is not mapped); 12 bytes with u32 at 8 EpubNavigationStyles (0 NoNavigation, 2 TocStyleNavigation, 3 BookmarksNavigation). 18 of 18 for each attribute; the parse ends at the chunk's end in all 18.

PublishExportPreference, chunk 0x21A20 (9 files, all trustworthy), in order: u32 0, u32 1; strings PublishFileName, PublishDescription, PublishPageRange; 16 bytes; a string (empty in all); 7 bytes; a string (empty in all); 5 bytes; string CoverPage (flag 1 and empty text: $ID/). 9 of 9; the parse ends at the chunk's end. ImageExportResolution follows the exporting edition (below).

Without the chunk every file of the corpus of 2026-10 has these values (all pairs; trustworthy in brackets):

Element	Values	Files
EPubExportPreference	Id urn:uuid:29d919dd-24f5-4384-be78-b447c9dc299b, TocStyleName $ID/, UseTocStyle and BreakDocument false, ExportOrder LayoutOrder, EpubCover FirstPage, CoverImageFile and EpubPublisher empty, ParagraphStyleName $ID/NormalParagraphStyle, PreserveLayoutAppearence and EmbedFont true, ImageExportResolution Ppi150	1,411 (1,205)
	Version Epub2 before INDD 18.1, Epub3 from 18.1	1,411 (1,205)
	CustomImageSizeOption SizeFixed before INDD 21.1, SizeRelativeToTextFlow from 21.1	1,410 of 1,411 (1,205 of 1,205); the other is a stale pair
	FootnotePlacement FootnoteAfterStory, UseOriginalImageOnExport false: IDML has them from INDD 9.2	1,306 (1,112)
	the six metadata strings empty, UseExistingImageOnExport false: IDML has them from INDD 10.0	1,302 (1,108)
HTMLExportPreference	ExportOrder LayoutOrder, ViewDocumentAfterExport true, PreserveLayoutAppearence false, PreserveLocalOverride true	1,443 (1,235)
EPubFixedLayoutExportPreference	EpubCover FirstPage, CoverImageFile, EpubPublisher and the six metadata strings empty, TocStyleName $ID/, Id as for EPUB, EpubNavigationStyles NoNavigation	1,322 (1,127)
PublishExportPreference	PublishFileName, PublishDescription, PublishPageRange empty, CoverPage $ID/	1,211 (1,023)

The version boundaries are those of the INDD header: no IDML of an earlier version has these attributes, every IDML from that version on has them.

EPubExportPreference ViewDocumentAfterExport="true" is in the IDML of DOM 8 and 9 only, with the chunk or without it: 107 of the 108 distinct corpus IDML files of those versions (the other, a DOM 8 file, has false); one DOM 7 file has it too, and no file of DOM 10 or later. The chunks read above do not hold it. The converter writes true for DOM 8 and 9: 97 of 97 values in the trustworthy pairs.

EPUB accessibility

EPubExportPreference and EPubFixedLayoutExportPreference have nine attributes EpubAccessibilityFeature, …Hazard, …Mode, …ModeSufficient, …Summary, …ConformsTo, …CertifiedBy, …Credentials and …ReportLink. They are empty in every corpus IDML that has them. EPubExportPreference EpubCreatePageNavigation is true in every IDML that has it. The boundaries are by INDD header version, major and minor (every pair from 19.0 on):

INDD header version	Pairs	Accessibility attributes	EpubCreatePageNavigation
19.0–19.2	56	none	none
19.3	3	all 9 on both elements, empty	none
19.4–19.5	6	all 9, empty	true
20.0–21.5	93	all 9, empty	true

The converter writes the nine attributes empty on both elements from 19.3 and EpubCreatePageNavigation="true" from 19.4.

No stored field is shown. Chunk 0x21A1A is 267 bytes in every file from 17.4 to 21.5 that has it (13 files), except one 20.1 file whose six metadata strings are filled (770 bytes); its length does not change at 19.3, so it holds no field for these attributes while they are empty. No corpus file has a non-empty value, so where one would be stored is not shown. No file from 17 on has chunk 0x21A25.

Adjust layout (AdjustLayoutPreference in designmap.xml)

From DOM 14. Chunk 0x7020 of the preferences object (26 bytes, 83 files): u16 at 0 EnableAdjustLayout, at 4 AllowFontSizeAndLeadingAdjustment, at 24 EnableAutoAdjustMargins; 83 of 83 each (36, 2 and 1 true). The u16 at 2 and 6 and the f64 at 8 and 16 have one value in every file (1, 0, 6, 324), as have the IDML attributes next to them; they are not mapped. Without the chunk (634 files, 547 trustworthy) the last two are false in every file, and EnableAdjustLayout follows the save history (below).

Values of the exporting edition

Some values have no field in the INDD: IDML writes the defaults of the InDesign that exported it. The converter takes that application from the save history (objects.md, save history) or from the name of the document's assignment, which is in the language of the edition that made the document (objects.md, assignments). These rules have exceptions where a document was exported by another installation than the one that saved it last; the counts give them. Over the corpus of 2026-10, trustworthy pairs (all pairs in brackets):

Value	Rule	Matches
BaselineFrameGridColor (preference and object styles) where chunk 0x2834 names no colour	Charcoal when the last session's language code is 0x0101, else LightBlue	1,112 of 1,209 (1,318 of 1,416); the byte-168 rule matched 892. 96 exceptions are two collections of one Korean publisher (code 0x0101, IDML LightBlue)
DocumentPreference ColumnGuideColor without chunk 0x555	Lavender for code 0x0101, else Violet	822 of 845 (965 of 989); 22 exceptions in the same collections
GridPreference gridline divisions and subdivisions without chunk 0x545	code 0x0101: 56.69291338582678 (20 mm) and 10; else 72 and 8	with the documents that have the chunk, 1,152 of 1,251 for each of the four values (915 with 72 and 8 for every document); 96 of the 99 exceptions are the same two collections, 3 are other documents (one with code 0x0101 and 72, one with another code and 20 mm, one with 28.35)
MarginPreference ColumnGutter without chunk 0x555	code 0x0101: 14.173228346456694 (5 mm); else 12	with the documents that have the chunk, 1,223 of 1,251 (1,021 with 12 for every document); 22 of the 28 exceptions are the two collections, 6 others have 17, 20 or 5 mm with another code
PrintPreference and PrintBookletPrintPreference MarkType stored as kJMarksWithCircle	JMarkWithCircle for code 0x0101, else Default	1,154 and 1,131 of 1,251 (1,014 and 956 with the stored name alone); the exceptions are 96 documents of the two collections with Default in each element, one more for PrintPreference, and the booklet settings of 24 documents without chunk 0xAF2 (below)
WatermarkPreference WatermarkFontFamily, WatermarkFontStyle without chunk 0x16344	by the assignment name: English Minion Pro Regular, Korean Adobe Myungjo Std M, traditional Chinese (未指定的 InCopy 內容) Adobe Ming Std L, Japanese Kozuka Mincho Pro R; other languages none	1,251 of 1,251 each (57 without the chunk)
PublishExportPreference ImageExportResolution, PublishPdf	by the last session's version: 11.0 Ppi72 and no PublishPdf; 11.1 Ppi96 and no PublishPdf; 11.2 and later Ppi96 and PublishPdf="false"	1,021 of 1,023 trustworthy pairs from 11.0 (the two exceptions have an IDML of another release than the last session); by the header version 5 more fail, among them 3 files of header 11.4 last saved by 11.0
AdjustLayoutPreference EnableAdjustLayout without chunk 0x7020	true when the last session's version string starts with 14.0.0 or 14.0.1, else false	634 of 634 files from version 14 without the chunk (547 trustworthy)
IndexOptions Title and BetweenEntriesSeparator without chunk 0x13010	the title by the saving edition (objects.md, saving edition); without a black name, and for the separator, by the assignment name: Japanese 索引 and 、; Chinese 索引 and ; ; Korean 색인 and ; ; English, French, German, Dutch Index and ; ; Italian Indice and ; ; other languages ; and no title; English with a last session of code 0x0101 ; and no title	title 1,250 of 1,251 (by the assignment name 1,096 of 1,155 written, 59 English documents saved by a Korean or Italian edition, 30 left out); separator 1,183 of 1,185
LayoutAdjustmentPreference SnapZone without chunk 0x7006	0.70866141732283 (0.25 mm) when the horizontal ruler unit is millimetres or centimetres or the assignment name is not English, else 2	1,172 of 1,183 (1,358 of 1,377); the exceptions are English documents in picas, points, inches or pixels
DOMVersion of every part	by the last session's version (idml-values.md, DOM version)	1,164 of 1,251
KeyboardShortcut of a style with a digit key	by the platform of the last session (objects.md, styles)	3,154 of 3,154 character and 6,927 of 6,928 paragraph styles

The assignment names are Unassigned InCopy Content (English, 648 files), 할당되지 않은 InCopy 내용 (Korean, 433), アサインされていない InCopy の内容 (Japanese, 155), 未指定的 InCopy 內容 and 未指定的 InCopy 内容 (Chinese, 93), Contenu InCopy non affecté (French, 67), Nicht zugewiesener InCopy-Inhalt (German, 44), Niet toegewezen InCopy-inhoud (Dutch, 10), Contenuto InCopy non assegnato (Italian, 3) and four others in one to four files (Russian, Spanish, Czech, Portuguese), whose titles are not written. Korean editions write the code 0x0101 as Japanese and Chinese ones do, so the code alone does not give the title: 369 of 369 documents with the Korean name have 색인, with either code.

Default styles, grids and other settings

Chunks of the preferences object, trustworthy pairs. A colour is the UID of an interface colour (objects.md, interface colours).

Default styles. Each chunk is a list of u32 UIDs; the third is the default:

Chunk	u32 at 8	u32 at 12	u32 at 16
0x28D4 (12 bytes)	TextDefault AppliedParagraphStyle
0x28D5 (12 bytes)	TextDefault AppliedCharacterStyle
0x1B959 (20 bytes)	PageItemDefault AppliedGraphicObjectStyle	AppliedTextObjectStyle	AppliedGridObjectStyle

The first two UIDs are the root style and the root style group. The reference is written as other style references; UID 0 is the root style. Evidence: every pair has the three chunks. Paragraph 487 of 489 (the other two name another style in IDML; not explained), character 489 of 489, graphic and text object styles 489 of 489.

Layout and story grids. Chunks 0xCD2F (LayoutGridDataInformation) and 0xCD2E (StoryGridDataInformation) start as page chunk 0xCD02 (objects.md): u32 font family UID (AppliedFont), a flag byte and the font style (FontStyle), five f64 (PointSize, CharacterAki, LineAki, and HorizontalScale and VerticalScale as fractions of 100 %), four u32 codes. Chunk 0xCD2E continues with u32 0 and f64 CharacterCountSize. Evidence: every pair has both chunks; all values match in 489 of 489 but AppliedFont (488: one family that IDML names in another form, fonts.md).

Single settings.

Chunk	Layout	IDML	Without the chunk	Evidence
0x59C	u16 1	DocumentPreference MasterTextFrame, CreatePrimaryTextFrame (DOM 8 on) true	false	14 with, 475 without; 489 of 489
0x1081F	u32: 2 RGB, 3 CMYK	TransparencyPreference BlendingSpace	CMYK	62 of 62; 427 of 427
0x5A6	u16: 1 true, 0 false	DocumentPreference AllowPageShuffle	(in every file)	489 of 489
0x568	u16	GuidePreference GuidesShown	true	114 of 114; 375 of 375
0x55A	u8 at 0, u8 at 2	GuidePreference GuidesSnapto, GridPreference DocumentGridSnapto	true, false	26 of 26; 463 of 463
0x53F (22 bytes)	u8 at 0; colour at 18	GuidePreference GuidesInBack, RulerGuidesColor	(in every file)	489 of 489
0x55F	colour at 30; u8 at 34: 0 TopOfPageOfBaselineGridRelativeOption, 1 TopOfMarginOfBaselineGridRelativeOption	GridPreference BaselineColor, BaselineGridRelativeOption	(in every file)	489 of 489
0x545	colour at 32	GridPreference GridColor	LightGray	14 of 14; 475 of 475
0x550	colour at 36	DocumentPreference MarginGuideColor	Magenta	388 of 388; 101 of 101
0x555	colour at 18	DocumentPreference ColumnGuideColor	(observed value)	72 of 72
0x5D2	colours at 20, 24, 28	PasteboardPreference BleedGuideColor, SlugGuideColor, PreviewBackgroundColor	Fiesta, GridBlue, LightGray	80 of 80; 409 of 409
0x54A (18 bytes)	f64 at 0, f64 at 8	Document ZeroPoint	0 0	46 of 46; 443 of 443
0x7006 (20 bytes)	u8 at 0; f64 at 12	LayoutAdjustmentPreference EnableLayoutAdjustment, SnapZone	false (1,377 of 1,377 in the corpus of 2026-10), SnapZone below	24 of 24
0xCA0B	u16 1	ViewPreference ShowTextThreads true, INDD version 21.1 on	false	IDML has the attribute only from version 21.1: 26 of 26 (28 of 28 in all pairs)

Without chunk 0x555, ColumnGuideColor and without chunk 0x7006 SnapZone follow the edition (values of the exporting edition, below).