Parallels Desktop application has three different settings for graphics
Best for Retina
- Windows interface elements and text are clear, sharp and at full size for Retina displays
- DPI scaling for Retina displays is set to the same resolution as macOS
- DPI scaling for external non-retina displays is forced to 200%
- This option is supported by Windows 7 and later
In this mode Windows resolution on external non-retina displays is artificially quadrupled. If the scaling is set to 125% on Retina display - text is too tiny which cannot be changed within Parallels virtualized environment.Windows applications which support DPI scaling should look as good as native macOS apps.
- Windows resolution is set to 1/4 of your Mac's native resolution which resembles older non-retina display computers
- It's best adjusted for Windows applications that do not support high-DPI settings and appear small onscreen, however Windows interface elements and text are not sharp
- DPI scaling is set to 100% by default
In this mode every Windows pixel is quadrupled. Windows resolution and DPI setting don't change. Still being contrasted to native retina applications it appears fuzzy and pixelated
Best for external displays
- All displays are set to their native resolution
- DPI scaling is adjusted automatically for each display
- This option is supported by Windows 8 and later but works best for Windows 10 where one of the displays is non-Retina
In this mode you have more control over scaling factor but Windows applications still require full support of DPI scaling.
Parallels Desktop 15 brings a brand new feature which automatically detects the external display(s) connected to a Mac with Retina display and switches your graphics configuration from Best for Retina to Best for external displays mode.
For more information regarding resolution issues please see KB 114700