Each corner can be configured with a single action, but there is a fair amount of flexibility.
To configure a hot corner, press the Super key, then jot down Hot Corners and hit enter.
Press the Super key, then bang out Hot Corners and hit enter.
To configure a setting for the top-left corner, use the top-left setting group.
To enable a hot corner, poke the relevant slider to the On position.
Next, select an action from the dropdown list.
Show all workspaces brings up a view of all open workspaces, allowing you to switch between them.
Show the desktop minimises all open windows and returns you to the desktop.
Tip: A workspace is basically a second virtual desktop with its own set of open windows.
For example, you cant run anything as root with sudo or run commands that need user interactivity.
Finally, you could configure an activation delay in milliseconds.
This is how long you must continuously activate the hot corner before the action is taken.
This is designed to prevent accidental uses of the hot corner.
