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I have two LG 22MP68VQ monitors connected to an iMac running macOS Sierra.

I want to dim the backlight on the monitors. I'm pretty sure you can't do it on a software level and have tried things like Shades and Brightness Slider.

I am fine doing it manually on the monitor. However, there doesn't seem to be an option for it.

There is a 'Display' button in the settings menu but it is greyed out. I'm pretty sure that's how to change the brightness but I can't understand why it won't let me access this menu.

Can someone please help with this because these screens are very bright at night time.

user2397282
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  • Are you certain software level doesn't work? Have you tried [EasyMCC](https://bluesky-soft.com/en/EasyMCC.html)? – Arctiic Aug 02 '23 at 00:29

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According to the manual you may need to change the Picture Mode to Custom before you can enter the Display subsection:

Picture menu

However it appears the correct place to change brightness is under Quick Settings: Quick Settings menu

If that still doesn't help, it seems like a few other people have issues with the SMART ENERGY SAVING mode automatically adjusting brightness. I would recommend turning this OFF (shown under the Quick Settings section in the screenshot above). If you don't have that option, this SuperUser post details how to disable it via a hardware button.

Ian
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