Make sure the control that you want to create a tip for is selected, and then click Properties on the toolbar to open the control's property sheet.
In the ControlTipText (forms and reports) or the Title (data access pages) property box in the property sheet, type the message you want to display for the control. You can type up to 255 characters.
You can also create a custom Help file or custom What's This tips for your form. For more information, click .