Web Reference: Feb 22, 2026 · In the following example, the brightness symbol has a down arrow next to the brightness symbol indicating that the Fn and F1 key would decrease brightness (increase darkness). To change the brightness on an external monitor, use the buttons on it. Some PCs can let Windows automatically adjust screen brightness based on the current lighting conditions. To find out if your PC supports this: This automatic setting helps make sure your screen is readable wherever you go. Dec 1, 2023 · To change the brightness on Windows 11, open “Quick Settings” (Windows key + A) and use the “Brightness” slider to increase or lower the intensity level. Alternatively, open Settings > System > Display and adjust the brightness by using the “Brightness” slider.
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