After spending some time looking over the CD-ROM my advisor gave me of previous group talks, I think I've decided that given time constraints, it will be better to go with PowerPoint, simply because there are many background/general slides about our experiment that I can use with little/no modification. PowerPoint, I think, will also cooperate better with movies, of which I will probably show one or two.
LaTeX would have its greatest advantage if I were giving a theory talk with lots of equations. In such a case, I could do a lot of cutting and pasting from previously typed up equations. But this is supposed to be a fairly general talk and I don't intend to have more than a handful of them, at most. If anything, I can typeset the equations in LaTeX and make them into images that can be put into a PowerPoint slide. So while I really appreciate your offer, and might be glad to take you up on it some other time, I don't think this talk is the right one for it.
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LaTeX would have its greatest advantage if I were giving a theory talk with lots of equations. In such a case, I could do a lot of cutting and pasting from previously typed up equations. But this is supposed to be a fairly general talk and I don't intend to have more than a handful of them, at most. If anything, I can typeset the equations in LaTeX and make them into images that can be put into a PowerPoint slide. So while I really appreciate your offer, and might be glad to take you up on it some other time, I don't think this talk is the right one for it.