CLTR + H = Hide selection and show selection ( toggle)
CLTR + U = Adjust Hue/ Saturation
CROP = Cut pixels to exact dimensions.
RUBBER/CLONE = Select the source with ALT+ click and mask the desired object
ERASER = Erase
GRADIENT = select color gradient. ( hold ALT to change to eyedropper tool)
EYEDROPPER= sample color
SHAPES = Line/Square/ Circle etc. Make sure "fill pixels" is selected.
TAB =
Tip: hit "ALT" to change to move ( explore more)
