Adobe Photoshop CS4 Keys for using the Brushes panel keyboard shortcuts keys

Shortcut                                                                 Command
Optn-click brush	Delete brush
Double-click brush	Rename brush
Ctrl + Optn + click-drag	Change brush size
Cmnd + Ctrl + Optn + click-drag	Decrease/increase brush softness/hardness
, (comma) or . (period)	Select previous/next brush size
Shft + , (comma) or . (period)	Select first/last brush
Caps Lock	Display precise cross hair for brushes
Shft + Optn + P	Toggle airbrush option