Adobe Photoshop CS4 Keys for transforming selections, selection borders, and paths keyboard shortcuts keys

Shortcut                          Command
	This is not a complete list of keyboard shortcuts. This table lists only those shortcuts that are not displayed in menu commands or tool tips.
Optn	Transform from center or reflect
Shft	Constrain
Cmnd	Distort
Return	Apply
Cmnd + . (period) or Esc	Cancel
Cmnd + Optn + T	Free transform with duplicate data
Cmnd + Shft + Optn + T	Transform again with duplicate data