Increasing the size of Excel's sheet tabs comes from an unlikely setting—a Windows setting for scrollbars.
- From the Windows Start menu, choose Control Panel.
- Double-click Display.
- Click the Appearance tab.
- Click Advanced.
- From the Item dropdown list, select Scrollbar.
- Increase the setting of the Size option—the following shot shows the setting doubled from the default setting of 20 to 40.
- Click OK twice. It will take a few seconds for Windows to update your system.