PDF Check layers.

What does it show?

It shows the number of layers found in the PDF, which were used by the preparing process during editing. They were not combined when the PDF was generated.

How to interpret the result?

For example if the result is 6:2. It means that the PDF contains a surface with 6 layers and a surface with 2 layers.
What does the warning mean?
The editing layers might cause problem or fault when the document is processed in the printing company.
How the problem could be resolved?
The layers can be combined with a simple conversion.