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.

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.

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

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.

Insert Page Numbers in a PDF If you're using Adobe Acrobat to edit a PDF file, you can add page numbers in your preferred style to some or all of the document.

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.

Converting Apple Pages documents to PDF is a straightforward process and can be completed in just a few minutes on a Mac, iPhone, or iPad. Here's how.

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