You may experience reduced monitor brightness when using the privacy filter.
You can adjust your brightness, contrast, and color settings to your liking using the menu buttons on the bottom of the monitor.
The following settings are recommended when using the privacy filters.
Brightness: 95
Contrast: 98
Dynamic Contrast: Off
Black Stretch: Off
Video Level: Auto
Color: Neutral or HP Enhance + Level Medium.
You can learn how to use the monitor menu buttons in this article.