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. If you’ve never used Gimp—a free image editor available ...

Editing PDFs is something many people need to do, but unfortunately it’s not always the easiest thing to do. The format is not designed to be easily edited, and despite a plethora of Windows and web ...

Make the most of the built-in Mac app. It can edit PDFs, remove backgrounds from photos, and more. Image: D. Griffin Jones/Cult of Mac You might only use the Mac’s built-in Preview app when you need ...