Way back when CS4 came out, I did a video tutorial on how it works. Our own Nicole Young gives you her take on it in this new video.
This post sponsored by the Digital SLR Store
If you use Photoshop CS4 and one of the newer MacBook Air or MacBook Pro computers, you may have trouble with the multitouch gestures being misinterpreted by Photoshop.
To solve the problem, Adobe has created a plug-in that disables the multitouch gesture for canvas rotation, as well as gestures for zooming and flick panning.
This plugin only works on the OSX version of CS4.
Click on the Vimeo link to see this full size.