If you're looking for a quick way to edit or sign a PDF document, there are free and easy-to-use tools for iOS, Windows, and ...

You can draw, highlight, and take notes, then save your notes for future reference. The only catch is that you can only ...

Don't annotate in a way that distracts attention from the work, eg by writing over an area of a drawing in large text. Don't use annotations to label obvious things, eg ‘oil pastel drawing of a ...