margins and centering

I hope to use Prosper for an upcoming talk and have a initiate's 
problem.

I plan to  give the talk using Acrobat but must be prepared with 
transparencies. I  find that the printed slides provide very small 
margins (I am use the "rico" style) - in  fact some of the text in the 
slide headings and the slide caption is lost.

Is there a way  to control the margins?

The other issue is that with other styles (autumn for example) my text 
falls inside the colored boundary that forms the accent of the style. 
How can this be avoided?

Are these two problems related?

Thanks

Donal



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