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Create PDF layers from top-level layers (document.exportPdf createLayers, the Save PDF dialog's General option) now writes an optional content group per top-level layer (template layers are left out): named as the layer, off when the layer is hidden, /PrintState /OFF when its Print option is off, locked when it is locked, listed top first, with a print auto-state (not under a standard). The file reopens with those layers. The PDF writer has no optional content, so each layer is drawn as a form of its own (no transparency group, so it draws as in place) starting with a mark; after writing, the uses of the layers' forms are wrapped in /OC ... BDC/EMC and the catalog gets /OCProperties (crates/pdf/src/forms.rs, through the shared patch writer and the PDF syntax reader of encrypt.rs). PDF 1.4 and a knockout page group write plain page content with a warning; the dialog greys the option at 1.4. The "not written yet" warning is gone. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>