How can I keep the screen going to semi dark?

Hi,

when I try to make a screenshot, the screen goes very dark. Sometimes I cannot see the mouse pointer any more, especially since the mouse pointer cross is so very small. It takes me like three minutes or more to find it by slooowly hovering the mouse across the screen back and forth and guessing where it might be.

In the settings I have not found any option to turn this off.

Is it possible to keep the screen just as it is, when taking a screenshot?

Thanks and best regards
Jeff