47 lines
2.0 KiB
Markdown
47 lines
2.0 KiB
Markdown
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---
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title: PDF OCG Layers
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description: View, toggle, add, and delete Optional Content Group (OCG) layers in a PDF document.
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---
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# PDF OCG Layers
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Manage the Optional Content Groups (OCG) -- commonly called "layers" -- inside a PDF. You can toggle layer visibility, add new layers (including nested child layers), delete layers, and save the modified PDF.
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## How It Works
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1. Upload a PDF file.
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2. Click the process button to load the document with the PyMuPDF engine.
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3. The tool displays all existing layers with their visibility state, lock status, and nesting hierarchy.
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4. Toggle checkboxes to show or hide layers. Locked layers cannot be toggled.
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5. Add new top-level layers by typing a name and clicking the add button, or add child layers under an existing parent.
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6. Delete layers you no longer need.
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7. Click **Save** to download the modified PDF with your layer changes applied.
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## Features
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- Displays layer hierarchy with proper indentation for nested layers
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- Toggle layer visibility on or off
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- Locked layer indicator prevents accidental changes
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- Add top-level or child layers with custom names
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- Delete individual layers
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- Saves all changes into a new PDF file
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## Use Cases
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- Toggling visibility of markup layers in architectural or engineering drawings
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- Adding new annotation layers to a multi-layer design document
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- Removing obsolete layers from a template before distributing it
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- Inspecting which layers exist in a complex PDF received from a third party
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## Tips
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- If the PDF has no layers, the tool shows an empty state with a prompt to add one. Not all PDFs use OCG layers -- they are most common in CAD exports and design files.
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- Child layers are visually indented under their parent. You can nest layers to any depth.
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- Locked layers are displayed with a lock icon and their checkboxes are disabled. These locks are set by the PDF creator.
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## Related Tools
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- [View Metadata](./view-metadata)
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- [Edit Metadata](./edit-metadata)
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- [Organize & Duplicate](./organize-pdf)
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