Belongs to
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Category: Layers
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Type: Checks
What it does
Checks the layers in a PDF.
You can set a number of different checks, such as:
- Document must not have layers, i.e. optional content is
not allowed.
- The document catalog dictionary must not contain
OCProperties key.
- Document must not have alternate layer configurations,
i.e. only one Layers panel ("layers palette") is
allowed.
- Layer configuration (i.e. the Layers panel) must have a
name.
- Multiple layer configurations (i.e. Layers panels) must
not have the same name.
- Layer group must not be missing from order, i.e. the
Layer group must be present in the order of the
Layer panel.
- Layer configuration (i.e. the Layers panel) must not
contain application specific usage entry.
About PDF layers
Layered content usually comes from applications such as InDesign, AutoCAD
or Visio. When converted to PDF, the layers are retained and can be
viewed and navigated in Adobe Acrobat. However, if you print a PDF
file that contains layers, only the content that is visible
on-screen is printed. This may or may not be desired.
"Conventional" layers versus PDF layers
Layers in digital image editing ("conventional" layers) are used
to separate the different elements of an image. Each element is
drawn on exactly one layer. The different layers are stacked on top
of each other, and the order of the layers defines how the image
looks like.
Layers in PDF have a different meaning. They are used to hide or
show page content:
- Turning on a layer, all objects on this layer are
shown on-screen.
- Turning off a layer, all objects on this layer
are hidden, i.e. they become invisible.
As such, layers are also called "optional content groups":
groups of objects that can be selectively viewed or hidden by the
author of the document. Objects can belong to different layers, and
the order of the layers is of no importance.
To work with layers in a PDF document in Adobe Acrobat, select .
For more information, refer to the Adobe Acrobat help.