Photoshop 7 Shortcuts (provided by Gia Truong)
Click for PDF version.

What you press…	What it does…
M	Marquee selection tools
V	Move tool
L	Lasso tools
W	Magic Wand
J	Patch Tool
B	Brush Tool
S	Clone Stamp
T	Text/Type tools
G	Paint Bucket/Gradient
Z	Zoom
D	Default foreground and background colors
X	Switch between background and foreground colors
Ctrl + 0 (zero)	Fit on screen
Tab	Disappear all open palettes and toolbox
Shift + Tab	Disappear all open palettes only
Ctrl + D	Cancel selection (Select-Deselect)
Ctrl + A	Select all
Caps Lock	Activate cross-hair pointer
Ctrl+Spacebar	Access Zoom tool while using another tool
Ctrl + C	Copy selection to clipboard
Ctrl + X	Cut selection to clipboard
Ctrl + V	Paste selection from clipboard
Ctrl + T	Transform/manipulate selection
F1	Help
Ctrl +Z	Undo/Redo
Alt+Ctrl+Z	Step backward (multiple undo)
F12	Revert to most recently saved version of photo
Ctrl+K	Edit—Preferences—General