The crop tool is the single most-used tool in Photoshop. In this video, Photoshop Senior Product Manager Bryan O’Neil Hughes explains the art of cropping and straightening in Photoshop.
Cropping & Straightening Photos in Photoshop
[youtube http://www.youtube.com/watch?v=8efiJ4FTpMU&w=640&h=360]
Crap. The things I learn… I’ve just been tilting my monitor.
I had no idea about the “modify>expand” commands.