To do this, right-click on the taskbar and unlock the taskbar. Again right-click and select Taskbar Properties. Under Taskbar tab, check the Auto-hide the taskbar setting. Click Apply > OK.
To do this, right-click on the taskbar and unlock the taskbar. Again right-click and select Taskbar Properties. Under Taskbar tab, check the Auto-hide the taskbar setting. Click Apply > OK.