Photoshop for Photographers ©
Bob DiNatale
Photoshop "Macintosh" Keyboard Shortcuts:
For lesson with
PC Keystrokes Click here
General:
  [Command+Z] toggles undo / redo last action
[Command+backspace] fills selected area Background color
[Option+backspace] fills selected area Foreground color
[Dbl. click + Zoom tool] resets magnification at 100% (which all filter effects should be evaluated)
[Drag Zoom tool] to create a bounding box, zooms image to area of bounding box
[Command+F] repeats last filter used
Selections:
 

Mouse Click outside the current selection clears selection
Mouse Down inside the current selection allows it to be moved
[Command+D] deselects current selection
[Command+H] hides marching ants… be careful to un-hide or you’ll think your crazy
[Shift]
while using the Rectangle and Elliptical Marquees will select a square of circle respectively.
Hold down "Spacebar" while selecting with Marquee tools allows the selection to be moved
[Command+click layer thumbnail] selects layer shape
[Shift+Command+I] inverts selection area
[Command+"+"] or [Command+"-"] while using the Lasso tools, zooms the image in and out

Layers:
  [Command+J] creates new layer containing selection area (more efficient than Copy and Paste)
[Option+click-layer eyeball]
toggles just one or all layers
[Command+click-new layer icon] creates adjustment layer
[Command+E] merges linked layers
[Shift+Command+E] merges visible layers
Grouping Layers:
 

[Command+G] groups with previous layer
[Shift+Command+G] ungroups active layer(s) from previous layer
[Option+click-layer line] groups / ungroups with layer(s)

Masks:
  "q" toggles Quick Mask
"x" toggles foreground and background colors
[Click+mask icon] (necklace) creates Layer mask of selection
[Command+I] inverts mask (or image) depending on Icon to the left of thumbnail
"[" (left bracket)
next smaller brush; Shift+[ smallest brush
"]" (right bracket) next larger brush; Shift+] largest brush
Tools:
  [Dbl. click "Zoom tool"] resets magnification at 100% (which all filter effects should be evaluated)
[Dbl. click "any tool"] with display Tool Option Palette
[Option+click "any tool"] will cycle through tool options
revision 2.1