Palettes are important in Photoshop CS. Palettes give you access to brushes, colors, and layers, as well as info and actions. The following table shows you how to access a palette: Just find the one you want and then check under the column for the type of system you use — PC or Mac — for the shortcut that opens the palette for you

Palette PC Mac
Brushes F5 F5
Color F6 F6
Layers F7 F7
Info F8 F8
Actions F9 Option + F9