  When we get lost in Virtual Reality (VR) or want to return to a previous
location, we use the same methods of locomotion for the way back as for the way
forward. This is time-consuming and requires additional physical orientation
changes, increasing the risk of getting tangled in the headsets' cables. In
this paper, we propose the use of undo actions to revert locomotion steps in
VR. We explore eight different variations of undo actions as extensions of
point\&teleport, based on the possibility to undo position and orientation
changes together with two different visualizations of the undo step (discrete
and continuous). We contribute the results of a controlled experiment with 24
participants investigating the efficiency and orientation of the undo
techniques in a radial maze task. We found that the combination of position and
orientation undo together with a discrete visualization resulted in the highest
efficiency without increasing orientation errors.
