Map Eject to Multitasking View
So I use ElementaryOS and in version 7 you are no longer able to map just the Eject key. I like to map this to the Multitasking View (something like the macOS Expose).
The solution is to use the DConf Editor application and search for show-desktop. ElementaryOS repurposes the show desktop to the multitasking view. Simply set the value to ['Eject']
Alternatively you can set the left-super key (windows/command) to the Multitasking View. This seems better supported.