How to Save Part of a PDF File to Another File. PDF files are text-based documents that can include links, ... Double click on the document you want to use to open it in Adobe Acrobat.

As such, it could open a PDF file as long as the %PDF-header started within the first 1024 bytes of the file. There’s, however, a change in the scheme of things now.

This saves time because the full Acrobat application does not need to load. However, this default setting makes it difficult to open multiple PDF files in separate windows.