Dynamic Screen Resizing, really?

I've downloaded and installed Beta 2, and the resulting desktop is smaller
than Beta 1's desktop, about 5 x 7. There is what looks like a resizing
control in the lower right hand corner. It allows me to shrink the already
small screen so that it has scroll bars, but does not allow me to make it
bigger. I may have to revert to Beta 1. But the user for whom I am
installing this already complained about the small screen size. Is there
some control or setting that I have missed, for getting more on-screen real
estate for the Remote Desktop?
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Greg Stigers, MCSA
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