I like the option to "Hold CTRL and move cursor to edge" to switch computers so that I do not inadvertently switch.

It would be better to control this from the mouse without using the keyboard. I tried assigning the middle mouse button to the keyboard shortcut ^CTRL. Unfortunately pressing the middle mouse button and "moving the cursor to the edge" did not switch computers.

Assigning a button action to control switching computers when moving the cursor to the edge would be a welcome feature.