Instructions

1

Right-click any part of the taskbar and click "Properties." The "Taskbar and Start Menu Properties" dialog box launches.
2

Click the "Taskbar" tab and select the "Use Small Icons" checkbox. This reduces the size of the taskbar by reducing the size of icons. Click "OK" to save your changes.
3

Alternately, right-click the taskbar and uncheck the "Lock the Taskbar" option. Point to the edge of the taskbar until your pointer becomes a double-headed arrow, then drag the border downwards to decrease the size of the taskbar.