Very good! had not heard of beamer, either (nasty rhyme!)
So presentations are an array rather than linear powerpoint?
!-=o0o=-!
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By default they are arranged left to right, but you can nest section tags to make them turn vertical. I outlined my presentation so that the slides along the top are all topics. I plan to go through them horizontally at the beginning as an outline, and then backtrack to fill in all of the details.