ill explane the whole thing

Im house sitting for a friend so im using there at home laptop. The problem im having is that the RO client is full screening no only that its actually to big as part of it gets cut off. Now when i go to setup and change the resolution nothing happens. However when i click full screen i get the correct resolution and dimensions but in full screen either way i dont want it full screen.
Any ideas on how to fix this?
Also how do you scroll out with no mouse?