phoenixdoula

I'm brand new to this program, and am working on a slideshow. I don't like the effect of the changing transitions that the program automatically defaults to - and would like to use the simple fade in/fade out for all my slide shows - can I somehow set this as default, or do I have to manually change it for each slide. I tried to search for the answer, but didn't really get anywhere. I'm also wondering if there is an optimum image size/resolution I should be using. Thanks Jeanette