Edit PDF Files In Lion by hpp Posted on 2011/08/07 There are quite a few new and useful features in Mac OS X Lion. One is the cool annotation tool in preview. It lets you write in PDF files wherever you want by adding a text box. You may even insert your signature digitally via your Mac’s webcam. This entry was posted in Home, Lion Tips & Tricks, Mac OS, Misc. and tagged Edit PDF Files, Fill Out PDF Forms, Mac OS X, Preview. Bookmark the permalink.