- Support macOS Big Sur
- Don't require to disable SIP on Catalina and Big Sur, as macOS now supports overriding display properties in
/Library/Displays/Contents/Resources/Overrides - Add icon chooser with possibility to add custom display icon
- Add ability to change the flags, so that Displays prefpane can use Retina style
- Preserve all existing properties, so that Apple displays are not corrupted by customisation
Settings restore functionality hasn't been reviewed and tested, so it's disabled. It will be restored in the next update.