[eropple]

It wouldn't do anything. The keyboard resizes the activity window. There's nothing behind it to show through it.

[marsvskittens]

There's an option to undock it from the bottom of the screen, in which case transparency could be useful.

[eropple]

Huh, where? Maybe I have an old version? No update request though.

[marsvskittens]

Long click on the "123" number button. You'll get a pop up menu with an undock option in it.