You can also get the option of brightness from your Menu tab. You can find the key or buttons on the external display. Then, you can find the buttons on the monitor itself. If you are using another external display or any third party display. How to adjust Mac’s Screen Brightness manually on an external display – Non-Apple product

If you are using an external display which is not made by Apple. You can also click on Automatically adjust brightness. If you are using the external show that’s made by the apple.Then, you’ll find a Brightness slider in the system preference. Now, you can control Mac’s brightness by moving the slider from left to right. How to adjust Mac’s Screen Brightness manually on an external display – Apple Product Then, you need to find them in entirely different places and in some cases, you won’t be able to see the hotkeys. If you are using another keyboard instead of Mac’s keyboard. How to Adjust Mac’s screen Brightness without Mac keyboard Then, tap fn+hot keys to adjust your Mac screen brightness.

If it is having sun logo present on your other hotkeys such as F14 and F15.

Now, tap on these hotkeys to adjust your Mac’s screen brightness manually.

Adjust brightness mac shortcut