Excel and all other Office XP programs now support the Microsoft Active Accessibility (MSAA) specification. This makes various accessibility aids more effective, including screen readers and screen enlargers. For more information, visit the Microsoft Accessibility Web site at http://www.microsoft.com/enable/.
Here is a list of built-in features that, either by design or by default, enhance Excel's accessibility:
Large Icons. Increases the size of toolbar buttons. Click the option of the same name on the Options tab of the Customize dialog box (found by clicking Toolbars on the View menu). For more information, see "Other Toolbar and Menu Options".
Show ScreenTips On Toolbars. Displays the little yellow labels under toolbar ...