Ctrl + Z Cancels a change
Shift + Z Adjusts the hue and saturation levels of the image
Num + Zooms in on the image
Num / Displays the image with its actual dimensions
Num * Displays the entire image in the Display area
Num - Zooms out of the image
Shift + F1 Pans an image
Shift + F2 Crops an image
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