ScreenTips are small windows that display descriptive text when you rest the pointer over a shape. Use ScreenTips to display extra information for a shape.
To add a ScreenTip to a shape, select the shape.
On the Insert tab, click ScreenTip.
Type the text for the ScreenTip, and then click OK.
To view the ScreenTip, position the pointer over the shape.
To edit or delete a ScreenTip, select the shape. Click Insert > ScreenTip, edit or delete the text, and then click OK.
Note: You cannot format or print the text of a ScreenTip.