Creating selections is a common photo-editing task. With Photoshop Elements 8, you can modify selections using a variety of click+drag operations. Here’s a list of how you can add to or subtract from Photoshop Elements 8 selections.

Action Windows Mac
Add to selection Shift-drag Shift-drag
Deselect from a selection Alt-drag Option-drag
Deselect all but intersected area Shift+Alt-drag Shift+Option-drag
Deselect Ctrl+D Command+D
Reselect last selection Ctrl+Shift+D Command+Shift+D
Select everything on current layer Ctrl+A Command+A
Hide selection outline Ctrl+H Command+H
Cut selection Ctrl+X Command+X
Copy selection Ctrl+C Command+C
Paste last cut or copied image Ctrl+V Command+V
Paste into a selection Ctrl+Shift+V Command+Shift+V
Adjust levels Ctrl+L Command+L
Adjust hue or saturation Ctrl+U Command+U
Adjust image size Ctrl+Alt+I Command+Option+I
Adjust canvas size Ctrl+Alt+C Command+Option+C