the below could be a nice option for the RDP connection
zoomed might not be the right word. But here the issue:
if you use (let say) surface pro 3 and setup a RDP @ 1280x1024 the window will be to small
if you select higher resolution the windows is bigger but then everything within is far to small
It would nice if you have an option to let say multiply the display by 1.5 or 2 or else
A bit like apps for iPhone only running on iPad you can select x1 or x2
to be fair all (Not for RDCAdmin to some extend) clients have the same issue and there is no easy solution.