Screen brightness

Hello, is there any way to change screen brightness without running terminal?

I know there is /sys/class/backlight/intel_backlight/brightness file and that I know that I can write scripts to handle it, but I mean only GUI way to control it.

There is yes.
Of course most laptops come with keyboard shortcuts for changing brightness.

On the top panel System > Preferences > Hardware > Power Management. That application has a slider to set display brightness.

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