Did you know that the Preview app in Mac OS X — that seemingly simple PDF viewer — can scan and add your printed signature to a document? A new addition to the Annotations bar makes it possible to take a photo of your signature using your Mac’s built-in iSight or FaceTime camera. Chris Rawson at TUAW describes how. follow link
Option-Click in Scroll Bars for Jump Scrolling
In Mac OS X in general, and thus in most native Mac OS X applications, hold down the Option key and click anywhere in a window's scroll bar to jump to that spot (rather than scrolling one screen). If you like this behavior, you can make it the default in the Appearance preference pane. For "Click in the scroll bar to:" select "Jump to here."
Capture Your Signature Using Preview