Adjusting retina scaling

The "best for retina" setting scales Windows by 199%. I would really like to scale it by 250% (since I normally run Windows at 125%). Adjusting it directly in Windows gets overridden by Parallels. Is this configurable anywhere? Thanks

 

Set VM Configuration > Hardware > Video > Resolution to More Space. This will revert font scaling in Windows to 100% and you'll be able to change it to your liking. With 250% scaling you'll need to disable mouse pointer shadow, otherwise up-scaled pointer will not be h/w accelerated.
On the other hand, many Windows apps' UI don't handle such high percentage scaling properly. You may be better off setting VM Resolution to Scaled and 125% fonts in Windows.

 

Works! Thanks.