My mom just purchased a 20" iMac to replace her old windows laptop. She used remote desktop to access her windows computer at work. So I installed the remote desktop client for mac from the windows site and got it running. The problem is I cannot get the remote desktop window to get very big. It makes using remote desktop a pain as she cannot maximize it or at least make it half the screen size. I click on the little diagonal lines on the bottom right corner of the screen and drag the mouse but it doesn't seem to want to get an bigger. Any help?