Hello,
So I’m using ZorinOS 15 which I’ve just installed on my Desktop.
I did install the drivers for my Nvidia graphic card.
Now, I’m trying to adjust the brightness which is at 100%.
Thus:
- is it possible to do it via the Terminal?
- is there a program for that?
- Something else?
1 Like
Other than using your built-in brightness and contrast controls on your monitor, go to Menu | System Settings | Devices | Displays then scroll down to Night Light and if off turn it on then move temperature slider all the way to the left or somewhere in-between. 
Thank you for the alternative and I may use it to further customize my screen display but I've just decided to reinstall Zorin completely.
First, I installed it without the graphic drivers for nvidia. So, I installed them afterwards. Since there where many options under : Software Updater | Settings | Additional Drivers, I didn't know which one to choose and therefore I certainly have installed not the best one which as a result might have been the cause of the problem.
Then, I reinstalled Zorin with the graphic drivers for nvidia and it's working perfectly.