I have been interested in using Prezi for awhile. I started one awhile back when I had about a 1 hour deadline to create a presentation and realized it was more complicated than I could do in the time period.

At yesterdays #coffeecue one attendee was working on a presentation and inadvertently had the canvas rotated 45 degrees.  After a Google search we were able to determine that she had accidentally hit the 3 key.

Press the 3 key and the canvas will rotate to the left.

Press the 4 key and the canvas will rotate to the right.

This does not change your presentation at all, just your view of the canvas while you are editing.

FYI: For those of you whose students have iPads there is a free  iPad app to allow for viewing of Prezi presentations.