One of the options for an event is "Return to prior state". However this seems to go back two states rather than one. So if I view Slide_X, then Slide_Y, then Slide_help, an event "Return to prior" will take me back to Slide_X.
A possible workaround is to use the event on Slide_help to go to Slide_goback, and on Slide_goback to use a Timeout Event of 1 second "Return to prior". But this means that the user gets to see an irrelevant slide for 1 second (the minimum timeout).
Is there a better solution?