Manage PDF Layers
View PDF layers (OCG) and toggle default visibility
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See the optional content groups (OCGs) in drawing and design PDFs and switch them on or off
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About Manage PDF Layers
In spec terms, PDF layers are optional content groups (OCGs). The shapes and text all stay in the file; the ON and OFF lists in the document's default configuration (the D dictionary under /OCProperties) decide what shows when the file opens. They're common in CAD drawings with dimension, plumbing and electrical layers, and in packaging artwork that stacks several languages.
This tool lists the layer names with their current default visibility, and saves the state you set with the checkboxes by rewriting the ON and OFF arrays. The content isn't touched, so the recipient can switch layers back on at any time in the viewer's layer panel.
Hidden is not deleted
A hidden layer's content remains in the file. It shows when turned on in the layer panel and can be read by text extraction tools. Don't use this to hide a layer with pricing or internal notes before sending a file out; for that, delete the layer in the source application and export again.
Nor is the default view guaranteed to be what prints. The spec lets each layer carry separate states for printing and export (the Usage and AS entries), and viewers that follow them print differently from the on-screen default. This tool does not change those entries, so if the printed result matters, print the saved file to PDF and check.
Worked examples
A floor plan for the contractor
- Input
Five layers: walls, dimensions, furniture, electrical, review notes — all shown- Output
Furniture and review notes off → 5 layers · 3 shown · 2 hidden
The recipient opens the file seeing only walls, dimensions and electrical. The review notes are still in the file and can be turned on from the panel, so if they must not leave the office, remove them in the source.
Multilingual packaging artwork
- Input
Layers: artwork, Korean, English, Japanese — only Korean shown- Output
Only English on, saved → a proof for the overseas client
One file can give a proof per language. For files going to press, though, you can't know how the printer's workflow treats layer settings, so sending a separately exported file per language is safer.
How to use it
- Add a PDF with layers.
- Tick only the layers that should show when the file opens.
- Reopen the saved file to confirm the default visibility.
Frequently asked questions
The layer names are cryptic, like L1 or Layer_03.
They're names assigned automatically by the exporting program. Turn them off one at a time and compare the saved results to see what each holds. Layers with no name are shown as “Layer n”.
Can I merge or delete layers?
No. Only the default visibility changes. Deleting means cutting the marked sections out of the content streams, which is outside this tool's scope.
It says there are no layers.
The document has no OCGs. Most PDFs exported from word processors don't.
Sources
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