I am using W520 with Quadro 1000M and am unable to locate the Screen Size and Position option in the nVidia Control Panel. I need to turn the "Scale with Fixed Aspect Ratio" option on, but cannot find it.
If you are running Optimus mode, the primary graphic controller will be Intel iGPU, therefore scaling, etc. and other settings would be mainly controlled by Intel(R) Graphics and Media. The configurations in Intel(R) Graphics and Media under Control Panel would be applied for both Intel and Nvidia GPU.
If you need scaling, go to Control Panel, Intel(R) Graphics and Media, Advanced Mode, Display Tabs, General Settings Sub Tabs, change to a lower resolution and you will see the scaling options appear. (Center Image, Scale Full Screen or Maintain Aspect Ratio).