Slide size with and without controls

Just some philosophical musing on the subject. If you want more screen space because you may be dealing with learners that need things to be larger to see them - that is admirable. If you want more screen space to be able to jam more material onto each slide - maybe you could rethink how people learn best. Nancy Duarte says if you have more than 50 word on a slide, you don't have a visual medium; you have a book. Personally, I think 50 words on one slide is kind of crowded. One concept at a time, and as simple as possible seems to fit our current knowledge of how people learn best.

But that's just my personal soapbox, and not the question you asked.