Warnings Information in this article applies to Adobe Reader 11. It may vary slightly or significantly with other versions or products. Some PDFs with restricted permissions cannot be combined.

I go step by step to show how I use Adobe Acrobat like a pro. I walk through all the key tools—from opening and editing PDFs to adding signatures, combining files, and protecting documents with ...

In this tutorial, we will disable the security warnings for a PDF file in the Adobe Reader or Acrobat Reader App. Go to Edit on the menu bar. In the Edit drop-down list, select Preferences.