Two weeks ago I asked ProfHacker readers, “How Do You Organize and Annotate PDFs?”, and you rose to the challenge. I can’t recount the entire discussion here (though it’s well worth reading through in ...

PDF Expert is a Mac PDF editor that lets you edit, sign, annotate, convert, and manage documents with ease. It’s now $79.99 ...

Add Yahoo as a preferred source to see more of our stories on Google. Way back in the early 1990s, Adobe released the Portable Document Format (PDF). Ever since, PDFs have been a key tool in getting ...

Evernote’s free image editing app, Skitch, now allows you to annotate and share PDF files on your iPhone, iPad, and iPod touch. You can then share those PDFs with other Skitch users, who will get a ...

Google Chrome has continued to add to its PDF functionality since the feature debuted in 2010, creating an ecosystem that ...

Google’s push to optimize its first-party apps on tablets continues with Drive for Android adding the ability to annotate PDFs using a stylus or finger. You will be able to “use your finger or a ...

PDFs are great, portable, cross-platform documents that you can read on your Mac, your iPad or iPhone, or on a PC. But this ubiquitous file format is also useful when you need to share works in ...

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Academics work with a lot of PDF files—journal articles, scanned ILL materials, and, increasingly, historical documents available through archives such as Google Books. After my first few posts here ...

On Windows and Mac machines, it’s not too troublesome to add text or drawings (such as signatures) to PDF files, but [Mansour Behabadi] found that on Linux machines, there didn’t seem to be a ...