I recently bought a new retina display iMac (El Capitan) with Parallels 11. When I installed the latest update to Parallels 11, the screen resolution got worse. The resolution running Windows 7 Pro was better before the update. I am running my Windows display at 1920x1200 and my text resolution at 100%. The Parallels display is set at "best for retina." I run a CAD program in Windows, but this problem is not confined to CAD. Any suggestions?