Why does the artboard frame have 20px padding?

I’m sure someone has answered this already, but I’m new here. When trying to make the standard root box fill width and height of the component frame, there is a 20px gap that I can’t seem to remove. Is it supposed to be like this?

Hi @subsequent_starfish, you can click on the dimensions on the right side of the artboard, and set the View mode to the stretch option