Selecting
Draw marquee selection from center
Option–drag selection
Add to a selection
Shift
Subtract from a selection
Option
Intersect with a selection
Shift–Option
Make copy of selection w/Move tool
Option–drag selection
Make copy of selection when not in Move tool
Cmd–Option–drag selection
Move selection (in 1-pixel increments)
Arrow keys
Move selection (in 10-pixel increments)
Shift–Arrow keys
Select all opaque pixels on layer
Cmd–click on layer thumbnail (in Layers panel)
Reselect last selection
Cmd–Shift–D
Feather selection
Shift–F6
Move marquee while drawing selection
Hold Spacebar while drawing marquee
Viewing
Fit on Screen
Double–click on Hand tool or Cmd–0
100% View Level (Actual Pixels)
Double–click on Zoom tool or Cmd–1
Zoom in
Cmd–Spacebar–click or Cmd–Plus(+)
Zoom out
Option–Spacebar–click or Cmd–Minus(–)
Hide/Show all tools and panels
Tab
Hide/Show all panels except Tools panel and Options bar
Shift–Tab
Cycle through full screen modes
F
Scroll image left or right in window
Cmd–Shift–Page Up/Down
Jump/Zoom to part of Image
Cmd–drag in Navigator panel
Toggle layer mask on/off as rubylith
\
Layers
Create new layer
Cmd–Shift–N
Select non-contiguous layers
Cmd–click layers
Select contiguous layers
Click one layer, then Shift–click another layer
Delete Layer
Delete key
View contents of layer mask
Option–click layer mask icon
Temporarily turn off layer mask
Shift–click layer mask icon
Clone layer as you move it
Option–drag
Find/Select layer containing object
Control–click on object w/Move tool
Change layer opacity
Number keys (w/Move tool selected)
Cycle down or up through blending modes
Shift–Plus(+) or Minus(–)
Change to a specific blending mode
(w/Move tool) Shift–Option–letter (i.e.: N=Normal, M=Multiply. etc.)
Switch to layer below/above current layer
Option–[ or Option–]
Move layer below/above current layer
Cmd–[ or Cmd–]
Type
Select all text on layer
Double–click on T thumbnail in Layers panel
Increase/Decrease size of selected text by 1 pt
Cmd–Shift–> or <
Increase/Decrease size of selected text by 5 pts
Cmd–Option–Shift–> or <
Increase/Decrease kerning/tracking
Option–Right/Left Arrow
Align text left/center/right
Cmd–Shift–L/C/R
Painting
Fill selection with Background color
Cmd–Delete
Fill selection with Foreground color
Option–Delete
Fill selection with Foreground color using Lock Transparent Pixels
Option–Shift–Delete
Fill selection with source state in History panel
Cmd–Option–Delete
Display Fill dialog box
Shift–Delete
Sample as background color
Option–click w/Eyedropper tool
To get Move tool
While in any painting/editing tool, hold Cmd
To get Eyedropper with painting tools
Option
Change paint opacity (with Airbrush OFF)
Number keys
Change paint opacity (with Airbrush ON)
Shift–Number keys
Change Airbrush flow (with Airbrush ON)
Number keys
Change Airbrush flow (with Airbrush OFF)
Shift–Number keys
To get Crosshair Cursor
While in any painting/editing tool, turn Caps Lock on
Decrease/Increase brush size
[ or ]
Decrease/Increase hardness of brush
Shift–[ or Shift–]
Switch between preset brushes
< or >
Open Brushes pop-up panel
Ctrl–click in image window
Erase to History panel’s source state
Option–Eraser
Cycle down or up through blend modes
Shift–Plus(+) or Minus(–)
Change to a specific blend mode
Shift–Opt–letter (i.e.: N=Normal, M=Multiply, etc.)
Create fixed color target from within a dialog box
Shift–click in image window
Delete fixed color target
Option–click on target with Color Sampler tool
Create new Spot Color channel from current selection
Cmd–click on New Channel button in Channels panel
Pen Tool & Paths
To get Direct Selection tool while using Pen tool
Cmd
Switch between Add Anchor and Delete Anchor Point tools
Option
Switch from Path Selection tool to Convert Point tool when pointer is over anchor point
Cmd–Option
To select a whole path w/Direct Selection tool
Option–click
Convert path to a selection
Cmd–click on path name (in Paths panel)
Panels
Show/Hide Brushes panel
F5
Show/Hide Color panel
F6
Show/Hide Layers panel
F7
Show/Hide Info panel
F8
Show/Hide Actions panel
Option–F9
Open Adobe Bridge
Cmd–Option–O
Miscellaneous Good Stuff
Switch between open documents
Cmd–Tilde(~)
Undo or Redo operations beyond last one
Cmd–Option–Z/Cmd–Shift–Z
Reapply last filter used
Cmd–F
Reapply last filter used, but display dialog box to alter settings
Cmd–Option–F
Temporarily switch to Hand tool
Spacebar
Reset dialog box
Hold Option, Cancel turns into Reset Button, click it
Increase/Decrease value (in any option field) by 1 unit
Up/Down Arrow
Increase/Decrease value (in any option field) by 10 units
Shift–Up/Down Arrow
Reapply last transformation
Cmd–Shift–T
Measure angle between lines (Protractor function)
After ruler is drawn, Option–drag end of line with Ruler tool
Move Crop/Selection marquee while creating
Hold Spacebar while drawing
Snap Guide to Ruler ticks
Hold Shift while dragging
Highlight fields in Options bar (n/a for all tools)
Return
Don’t snap object edge while moving
Hold Control while dragging