When using this tool with "Follow Main Screen" enabled, I found that the brightness on my iMac (2017) and Dell P2415Q displays didn't actually match, despite the brightness percents staying in sync. This PR adds a calibration scale setting so a user can manually calibrate the brightness of the external monitor relative to the primary monitor.
When using this tool with "Follow Main Screen" enabled, I found that the brightness on my iMac (2017) and Dell P2415Q displays didn't actually match, despite the brightness percents staying in sync. This PR adds a calibration scale setting so a user can manually calibrate the brightness of the external monitor relative to the primary monitor.