How to fix a disappearing Dock on a Mac computer in 3 different ways

Mac computers offer several ways to address your missing or disappearing Dock issue.
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You can fix a disappearing Dock on a Mac computer through a few troubleshooting methods.
Your Mac Dock keeps a selection of commonly used apps along the bottom edge of your screen for quick access.
While the Dock is usually visible on the screen, it can disappear with no clear way to get it back. 
Your Mac's Dock doesn't show up in full screen mode, and it can be set to disa