[OS X TeX] Non-linear slideshows?

[Christopher Allen]

For a while I've been interested in producing slideshows using 
equations and diagrams generated by LaTeX with pstricks. For it to be 
very useful for me, I would like to be able to move through a slide 
non-linearly. For example, if I have a picture of a box being dragged 
across a floor, I would like to be able to have vectors and labels for 
each force hidden and appear in an order not predetermined. This way I 
can have arrows appear in the order students identify them. Has anyone 
ever tried this? Any idea if there's a way to mix the conditional 
statements of LaTeX with any one of pdfscreen, ppower4, texpower, etc.?

Thanks,
Chris

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