Learn how to add page numbers to PDF files using free online tools or PC software. You can set position, font, etc., for page numbering.

You can delete pages from a PDF on a Mac using the Preview app. You can also add pages to a PDF in two ways with Preview.

Pariah Burke walks you through the process of adding, removing, and replacing pages in complex Acrobat Pro PDF files.

You may find when working with a PDF file that you need to remove some pages from the original file and create a new PDF with the extracted pages.

You can add a variety of file types, including PDFs, text files, images, Word, Excel, and PowerPoint documents. The app converts all the files into PDF format before combining them.

Need to create a PDF or save your current document in that file type? We’ll walk you through how to convert Apple Pages to PDF on Mac, iPhone, and iPad.

If you want to extract pages from PDF, then this post lists some free PDF page extractor software or online tools. Take a look!

Gimp is normally used to create or manipulate images files, but can also work with PDFs if you understand how it works and what it's limits are.

How the creator of a PDF file sets up her document determines the extent to which you can use Acrobat Reader's commenting tools to mark the file with notes about its content.