I've now played around with showing the toolbar using the d-pad middle button a bit, but still can't trigger it again. Haven't hit the right sequence of steps again, I guess.

Btw, it would be nice if the toolbar would show on press+hold for the needed amount of time directly rather than wait for the release. The way it is right now, there is no feedback on when you have pressed the button long enough. <cheap soap box>Good UI design is about feedback, feedback, feedback.</cheap soap box>