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M4.62: PDF/.ai layers from optional content: named layers with visibility, print state and lock; art that is off as hidden layers
Optional content groups become layers (in paint order, shared by every page) with their name, default visibility, print usage and lock; art outside them goes to a layer per page. Art that is off isn't lost: an update appended to the file drops its /OCProperties so the interpreter draws every group, and the marked-content sequences found walking the content (checked by tag) route the art to its group's layer, which comes in hidden. A form hidden by its own /OC keeps the file as it is. document.open layers: false keeps one layer per page of only what shows (Save then asks for a name). Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Claude Opus 5.5
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@@ -240,10 +240,12 @@ the backdrop colour gives Clip, an inverting transfer function Invert), transpar
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tiling patterns become pattern swatches, patch and triangle mesh shadings become gradient meshes, and gradients keep
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their stop opacity and stop where the shading doesn't extend. Text becomes point type, one object per run of a line in
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the file's font (by name; fonts that aren't available are listed in `warnings` and show in the fallback font) —
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`textAs: "outlines"` keeps glyph outlines instead:
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`textAs: "outlines"` keeps glyph outlines instead. Optional content groups (the layers of PDF and PDF-compatible `.ai`
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files) become layers with their name, visibility, print state and lock, art that is off coming in as a hidden layer;
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art outside them goes to a layer per page. `layers: false` gives one layer per page of only what shows:
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```json
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{"name":"run_command","arguments":{"command":"document.open","params":{"path":"/tmp/map.pdf","textAs":"outlines"}}}
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{"name":"run_command","arguments":{"command":"document.open","params":{"path":"/tmp/map.pdf","textAs":"outlines","layers":false}}}
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```
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Preserve Editing (`preserveEditing`, on in the `VectorCraft Default` preset) embeds the native document in the PDF as
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