Keyboard Commands:You may perform the following commands at any time. The indicated keystrokes are identical on PCs and Macintoshes. In other words, on Macs, always use the control key, never the Apple key.

CNTRL-Z	Undo any sequence of actions, one action at at a time.
CNTRL-Y	Redo any sequence of actions, one action at at a time.
CNTRL-A	Select All objects in simulation window.
CNTRL-X	Cut. Delete and copy selected object(s) to editing clipboard.
CNTRL-C	Copy selected object(s) to editing clipboard.
CNTRL-V	Paste object(s) from editing clipboard to the position(s) occupied when they were copied or cut.. Paste will not execute if other objects occupy those positions.
Backspace, Delete or CNTRL-H	Delete selected objects from the simulation window.
CNTRL-O	Opens Properties Box of selected object.
Arrow keys	Move selected object(s) one pixel per keystroke.
Shift + up/left arrow keys	Rotate selected object counterclockwise one degree per keystroke.
Shift + down/right arrow keys	Rotate selected object clockwise one degree per keystroke.