Unable to set custom resolution scaling in Windows virtual machine on Retina after upgrade to Parallels Desktop 12 for Mac

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Applies to:
- Parallels Desktop for Mac Standard Edition 12
- Parallels Desktop for Mac Standard Edition
- Parallels Desktop
Last Review: Aug 18, 2016
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Symptoms

I have upgraded to Parallels Desktop 12 for Mac, and now I cannot keep changes to scaling settings in Windows virtual machine. After I log in to Windows again, scaling is back to 200%.

Cause

To improve dynamic resolution of Windows virtual machine on Retina display in Parallels Desktop 12 for Mac, 'Best for Retina' option is now keeping the resolution scaling at 200%.

Resolution

If you want to manage resolution scaling settings in Windows virtual machine, please change resolution settings of the virtual machine to Scaled (VM configuration > Hardware > Graphics)

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