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But, you can just close your MacBook and then you can dim all 3 externals. If you have 3 externals this means you can't dim the far right one. Also of note it allows for dimming up to 3 monitors but remember your MacBook does count as 1 if it's open.

can't dim completely separately - this works for me as I use it to dim the 2 side monitors so they don't distract from the main middle monitor)Įdit2: The website appears to be down so here is the App Store link. My 3 external displays are non-apple (1 Dell with displayport, 1 samsung with displayport->dvi, and 1 old acer 19" with hdmi->dvi) on a MacBook Pro Retina 15" with 10.8.2.Įdit: For the OP's question this shouldn't matter, but fyi for 3 monitors - it seems to only allow one combination of monitors for dimming (i.e. Sits in menubar, and has a simple slider and monitor selector, as well as keybindings for brightness increase/decrease. Seems nice and elegant the short time I've used it. Hence, auto-brightness levels are more finely-tuned and consist of 7 levels as follows: SituationĪs you can see, it is easy to adjust Chromebook screen brightness using the dedicated keys or the on-screen slider.ĭo let us know your questions on Chromebook screen brightness using the comments form below.Screen Dimmer isn't free ($2), but is the only tool I could find that handles multiple monitors (up to 3). The Pixelbook has a better ambient light sensor. According to this Chromium developer documentation, Power source However, it does have a limited ability to adjust brightness. Auto-Brightness on Chrome OSĪt present, there is no way to control or tweak the auto-brightness settings on a Chromebook. You can use my config: in the ACER XF240H menu: Gamma: 2.2 Color Temp -> User USER color config (on marked user push middle monitor button to access extra menu): R Gain 3 G Gain 1 B Gain 2 6-axis Saturate -> Yellow Saturate 54 Brightness 30 Contrast 50 and finally apply this color profile. If you did, or have further questions, let us know in the comments section. Ok, don't use VGA control panel to config monitor. If you are looking for the keyboard shortcut to adjust the brightness of your Chromebook’s keyboard backlit, (if your Chromebook does have that feature) use the same brightness keys while holding down the ALT key. If a reset did not fix the display brightness, you might want to contact your Chromebook’s manufacturer for further troubleshooting. If it works, reset your Chromebook and try again. If you have issues adjusting your Chromebook’s screen brightness, log out and log in using the Guest account. Screen brightness slider Adjust Brightness Troubleshooting