v = Move tool m = Rectangular marquee tool i = Eye dropper tool g = Paint bucket/Gradient tool u = Rectangle tool h = Hand tool e = Eraser tool b = Brush tool
Ctrl (Cmd) + a = Select all (rectangular marquee) Ctrl (Cmd) + z = Toggle one step back Ctrl (Cmd) + Ctrl (Cmd) + Alt + z = Step backward (undo) Ctrl (Cmd) + Shift + z = Step forward (redo) Ctrl + 0 = Zoom to fill screen Ctrl + + = Zoom in Ctrl + - = Zoom out Ctrl + [ = Move layer up Ctrl + ] = Move layer down Ctrl + Shit + [ = Move to top (front) Ctrl + Shift + ] = Move to bottom (back)