Keyboard and On-Screen Feedback Choose which display responds to brightness keys and customize shortcuts and on-screen feedback. Explore subtopics Separate articles that explore this topic in more detail. Why do brightness keys stop working when the slider still works?If the menu slider still adjusts the intended display, first check keyboard handling and target selection. Can I assign separate brightness shortcuts to individual displays?Yes. Can I move the brightness and volume OSD to the bottom of the screen?Yes. Why do brightness keys change both displays when they are mirrored?In a mirrored desktop, the pointer is visible on both screens. Can the same brightness shortcuts use different step sizes on different displays?Yes, with a script that selects the display and chooses an adjustment amount before sending the brightness command. Can BetterDisplay use the system brightness and volume OSD?Choose an OSD style under Settings > Keyboard > OSD. Why does BetterDisplay ask for permission to control my computer?BetterDisplay requests this permission so it can handle the keyboard’s native brightness and audio keys and route them to the configured displays. Why does Scroll Lock or F14 change my display brightness?BetterDisplay can treat F14 and F15 as alternative brightness keys. Can I assign shortcuts to change my keyboard’s backlight brightness?Yes. Why does another app's brightness overlay stop at 100%?An overlay that reads only macOS brightness feedback may not know about BetterDisplay's brightness upscaling or external-display adjustments.