Screen Navigation

Command	Mac OS	Windows
Scroll Image with Grabber	Spacebar	Spacebar
Center Image	Spacebar + click	Spacebar + click
Zoom In	Spacebar + Command + click	Spacebar + Ctrl + click
Zoom Out	Spacebar + Command + Option + click	Spacebar + Ctrl + Alt + click
Rotate Image	Spacebar + Option + drag	Spacebar + Alt + drag
Constrain Rotate to 90 Degrees	Shift + Option + Spacebar + drag	Spacebar + Alt + Shift + drag
Orient Screen to Default View	Shift + Option + click	Shift + Alt + click