Smart Technologies smart board User Manual page 43

You can undo an unlimited number of previous actions on the current
page only by selecting Undo repeatedly. Once you have undone a
previously issued command or object, you can also change your mind
again and reinstate the original object by selecting Redo from the Edit
menu or pressing the Redo button.
The Undo command in the Edit menu changes to show the most recent
command or action affected. Undo applies to single annotations, multiple
selected annotations and annotation groups.
To delete the last annotation object created with the
Undo command:
Press the Undo button in the Full Toolbars.
or
Select Undo from the Edit menu.
or
Press Ctrl + Z.
The effect of the immediately previous command will be revoked.
You can continue to activate the Undo command to rescind any
number of previously issued commands for the current page.
To Redo the last command revoked with Undo:
Press the Redo button in the Full Toolbars.
or
Select Redo from the Edit menu.
The effect of the Undo command will be reinstated.
SMART Board User's Guide 39