With some monitors, you may also be able to adjust your screen’s brightness with an app like ScreenBright or Display Tuner, though they won’t work with all monitors. You’ll often find these buttons near the power button on a computer monitor. You may instead need to press some sort of “Menu” or “Options” button before you can access an on-screen display that will allow you to increase or decrease the brightness. Look for “brightness” buttons on the display and use them to adjust the display brightness. However, if you’re using a desktop PC with an external display–or even connecting an external display to a laptop or tablet–you’ll need to adjust this setting on the external display itself, and you usually won’t be able to do it automatically. Most of the methods in this article are designed for laptops, tablets, and all-in-one PCs. How to Adjust Brightness Manually on an External Display Change the “Display brightness” slider in the window that appears. Launch it by right-clicking the Start button on Windows 10 and 8.1 and selecting “Mobility Center,” or pressing the Windows key + X on Windows 7. You’ll also see this option in the Windows Mobility Center. Open the Control Panel, select “Hardware and Sound,” and select “Power Options.” You’ll see a “Screen brightness” slider at the bottom of the Power Plans window.

If you’re using Windows 7 or 8, and don’t have a Settings app, this option available in the Control Panel. Open the Settings app from your Start menu or Start screen, select “System,” and select “Display.” Click or tap and drag the “Adjust brightness level” slider to change the brightness level. But, you can just close your MacBook and then you can dim all 3 externals.You’ll find this option in the Settings app on Windows 10, too. 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. Screen Dimmer isn't free ($2), but is the only tool I could find that handles multiple monitors (up to 3).

Adjust brightness mac monitor