What does HackerNews think of Monitorian?
A Windows desktop tool to adjust the brightness of multiple monitors with ease
Monitorian and other apps let you adjust those settings from your PC.
There is also Monitorian for Windows:
For Mac users, look at https://lunar.fyi/. There are a bunch of other options as well.
For Windows, look at https://github.com/emoacht/Monitorian
GUI and CLI application to get/set various properties of your attached monitors. For windows. Works over the Display Data Channel (eg over HDMI).
In my case, I couldn't (from Windows display settings) lower the display brightness of my external monitor, leading to eye strain when the room is not well lit enough. This enables my to reduce the display brightness with ease.
There is an alternative, which can only change brightness but does so with a minimalistic gui: https://github.com/emoacht/Monitorian (have not tried it).
If not for ergonomics, you can use it to visually be notified when eg a script is finished, by toggling brightness back and forth.
An alternative to _that_ is to use the snoretoast application with something like this:
alias wakeme='date && /cygdrive/c/Dropbox/tools/notifications-w10/snoretoast/snoretoast.exe -t "hello" -m "wake up goddamit" -p "C:\Dropbox\tools\notifications-w10\mindblown.png" -s "ms-winsoundevent:Notification.Reminder"'
thus, you can "longscript.sh ; wakeme". From https://github.com/KDE/snoretoast