Q Light Controller+

I have the raspberry pie 4 with the 7 in touch screen and qlc+ does not size to the screen right how to fix it. wanted to uses to control lights in my studio

The standard touch screen has 800x480px resolution; hence you will have to change the resolution in your O.S. (when it's not correctly detected) [touch won't work either, because it has to be set up properly], and you have to tweak the QLC+ screen parameters (see documentation)