Great question — answering as the UphillTech team:
Ctrl + Alt + ↓ Down is the keyboard shortcut in Mint to show all open windows. Another easy alternative is enable a hot corner. Press the Super key (aka Windows key) and start typing h-o-t . . . until you see "Hot Corners" show up in the menu, then select it. One of the first options you'll see for Hot Corners is Show the window selection screen . To use a Hot Corner once enabled, you just slide your mouse to that corner and it will perform that command (also available in Mac OS). Either of these methods will show all windows regardless of whether they're minimized. Note this shortcut will do other things in other distros or operating systems, so it is somewhat Mint specific.
Full answer by Bob: https://unix.stackexchange.com/a/716543 (CC BY-SA 4.0).
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