How I lower brightness on Nebula Mars II Pro?

I just received my Nebula Mars II Pro. I am extremely happy with the quality of this projector… however I can’t not find a way to lower the brightness (other than image mode which doesn’t really help much). The default level of brightness is migraine inducing and spills over into the neighbors house (I’m in NYC so less than 8 feet of space between my house and the neighbors ).

Is there another way to reduce brightness that I’m not aware of that is native to the device or any external suggestion on how to reduce brightness and/or spill over?

Check every setting carefully

are you saying that there is a brightness setting? I’ve checked every setting

No, it was a suggestion to check every setting. Guess there is no way to reduce the brightness