Open your monitor’s on-screen display (OSD) menu using the physical buttons on the monitor
Find the Brightness setting
Increase or decrease the brightness using the monitor buttons
Save or exit the OSD menu
On Windows, open Settings
Go to System
Select Display
Adjust the brightness slider if available
On a laptop, use the keyboard brightness keys
Press the brightness up or brightness down key
Hold Fn if required
On macOS, open System Settings
Go to Displays
Adjust the brightness slider
On external monitors, use the monitor’s built-in controls
Check the monitor manual if the brightness option is hard to find
If brightness controls are missing, update your display drivers
If using a desktop, check the monitor software from the manufacturer
If using HDR or adaptive brightness, turn those settings off if they interfere with brightness control