The Disappearing Interface
Ubuntu uses a prominent vertical launcher on the left side of the screen, commonly referred to as the Dock. To maximize screen real estate, especially on smaller displays, Ubuntu includes a feature called “Intellihide” (or simply “auto-hide”). When a maximized application window overlaps the Dock’s space, the Dock automatically slides off the screen. You must throw your mouse cursor forcefully against the left edge of the screen to make it temporarily reappear. While this reclaims a few pixels of horizontal space, it slows down multitasking significantly, as you lose the ability to instantly see your open applications or click a shortcut without waiting for the animation.
Pinning the Dock
To improve your multitasking speed and stop Ubuntu from automatically hiding the Dock, you must configure the Dock settings to keep it permanently visible on your desktop.
Click the cluster of system icons in the top-right corner of your screen and select the gear icon to open the Settings application. In the left-hand navigation sidebar, click on Appearance (or Ubuntu Desktop in newer versions). On the right-hand side, look for the section specifically labelled “Dock.” The very first option in this section is a toggle switch explicitly named Auto-hide the Dock. Click this toggle switch so it turns grey (Off). The Dock will immediately slide back onto the screen and remain permanently fixed to the edge of your display. Any maximized windows will now automatically resize to fit the remaining space, ensuring the Dock is never covered up.