Index layer names if initial visibility or Processing Steps metadata is different
Layers can have regular and/or processing steps metadata attached to them.
When PDF files with identical layer names are merged together (for example, by the means of overlay), the layers are also merged.
This is problematic if the layers have different parameters, most importantly, different initial visibility or Process Steps metadata.
Indexed layer names
The PDF in the screenshot below has various 'layers' like 'Varnish', 'White' etc, as shown in the screenshot.
A modified version of the original PDF with reduced number of layers is now placed on the original PDF using 'Place content on page' Fixup.
This should merge the layer names as well.
Starting pdfToolbox 13, the layer names are indexed when PDF files with identical layer names are:
- Merged (Merge PDF)
- Imposed (Imposition or imposition based Actions like Overlay)
- Place content (with a PDF)
Please note that layer names are indexed and not merged when:
- initial visibility is different
- Processing Steps metadata is different