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 ...

As you may have heard, Mail in OS X Yosemite offers a couple of new features. One of the most interesting is Markup, a feature you can use to annotate images that you’re sending to another person. Let ...

Recognizing the utility of Markup annotation tools, Apple has extended their availability in recent versions of iOS, but it's worth bearing in mind that you can access a similar and equally useful ...