How to move a Window that is taller than the screen so that the lower hidden part is shown

How to move an application Window that is taller than the screen so that the lower hidden part is shown? I tried using Alt-Del-M (or Alt-Space-M for direct display) to move the Window up but it doesn't work. I've also tried to increase RDP resolution to full screen and font DPI is at 100%.

Note: I'm connecting to the Windows 7 machine using RDP. The app doesn't have a maximum option and I'm not able to change the GUI.