Shortcut Keys Of Adobe Photoshop cs6

Draw Marquee from Center	Option-Marquee
Add to a Selection	Shift
Subtract from a Selection	Option
Intersection 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)
Restore Last Selection	Cmd-Shift-D
Feather Selection	Shift-F6
Move Marquee while drawing selection	Hold Space while drawing marquee

V	Move
M	Marquee tools
L	Lasso tools
W	Quick Selection, Magic Wand
C	Crop and Slice Tools
I	Eyedropper, Color Sampler, Ruler, Note, Count
J	Spot Healing Brush, Healing Brush, Patch, Red Eye
B	Brush, Pencil, Color Replacement, Mixer Brush
S	Clone Stamp, Pattern Stamp
Y	History Brush, Art History Brush
E	Eraser tools
G	Gradient, Paint Bucket
O	Dodge, Burn, Sponge
P	Pen tools
T	Type tools
A	Path Selection, Direct Selection
U	Rectangle, Rounded Rectangle, Ellipse, Polygon, Line, Custom Shape
K	3D Tools
N	3D Camera Tools
H	Hand
R	Rotate
Z	Zoom
D	Default colors
X	Switch Foreground and Background colors
Q	Quick Mask Mode
To switch between all tools within groups, add the Shift key to the letters above
For example, to switch between rectangular and elliptical marquee hit Shift-M