For several years, photographer and designer Trevor Morris has maintained a great set of Photoshop keyboard shortcut cheatsheets. We’ve linked to his collection several times for previous versions of Photoshop. If you’ve upgraded to Photoshop CS4, download this handy PDF cheatsheet, print it out, and keep it near your computer: Photoshop CS4 Shortcuts (Mac) Photoshop CS4 Shortcuts (PC) If you have