How to Add the Sum Function to an Excel 2003 Toolbar

1. Open Excel 2003 and select 'Tools' on the menu bar. Select 'Customize.' The Customize dialog box appears. Click the 'Toolbars' tab. Select 'New.' The New Toolbar dialog box appears. Type a name for your new toolbar and click 'OK.'
2. Review your new floating toolbar. Click the 'AutoSum' button on the standard toolbar to reveal a drop-down list of functions. Click 'SUM.'
3. Drag 'SUM' from the standard toolbar to your new floating toolbar. Click 'Close' to close the Customize dialog box.