When manipulating artwork, Yate has to know if your Mac has a Retina display. When your Mac only has a single display, this is trivial. When you are using multiple displays the configuration, the possible use of a dock and the OS version can all affect the proper detection of a Retina display. You can override the default settings using the Settings - General - Advanced Determine if Retina display adjustments are required setting. Note that you should only modify this setting if you are using multiple displays and you feel you are having issues. The most obvious problem can occur when automatically scaling artwork. If you are seeing artwork twice or half the size you expect, you should try modifying the setting.
The reason for all this confusion is that the determination of the presence of a Retina display is associated with a screen's properties. However, Yate modifies artwork in a screen independent manner. The produced images are based on an absolute pixel size.
The setting has the following values: