Adobe Photoshop CS4 Keys for viewing images keyboard shortcuts keys

Shortcut                                                                Command
	This is not a complete list of keyboard shortcuts. This table lists only those shortcuts that are not displayed in menu cmnds or tool tips.
Ctrl + Tab	Cycles through open documents
Shft-Cmnd-W	Close a file in Photoshop and open Bridge
Q	Toggle between Standard mode and Quick Mask mode
F	Toggle (forward) between Standard screen mode, Maximized screen mode, Full screen mode, and Full screen mode with menu bar
Shft + F	Toggle (backward) between Standard screen mode, Maximized screen mode, Full screen mode, and Full screen mode with menu bar
Space + F (or Ctrl-click canvas background and select color)	Toggle (forward) canvas color
Space + Shft + F	Toggle (backward) canvas color
Double-click Hand tool	Fit image in window
Double-click Zoom tool	Magnify 100%
Spacebar	Switch to Hand tool (when not in text-edit mode)
Shft-drag	Simultaneously pan multiple documents simultaneously with Hand tool
Cmnd + spacebar	Switch to Zoom In tool
Optn + spacebar	Switch to Zoom Out tool
Spacebar-drag	Move Zoom marquee while dragging with the Zoom tool
Shft + Return in Navigator panel zoom percentage box	Apply zoom percentage, and keep zoom percentage box active
Cmnd-drag over preview in Navigator panel	Zoom in on specified area of an image
Hold down H and then click in the image and hold down the mouse button	Temporarily zoom into an image
Spacebar-drag, or drag view area box in Navigator panel	Scroll image with Hand tool
Page Up or Page Down*	Scroll up or down 1 screen
Shft + Page Up or Page Down*	Scroll up or down 10 units
Home or End	Move view to upper-left corner or lower right corner
\ (backslash)	Toggle layer mask on/off as rubylith (layer mask must be selected)
	*Hold down Ctrl () or Command (Mac OS) to scroll left (Page Up) or right (Page Down)