How do you make the little grey lines between measures disappear?

Hi. I want to take a video snapshot of the music running with the score and I can't because of the little grey line that appears between the first two bars because the first bar is a shorter duration than normal. I want the clef and the time signature to appear in the video, so I cannot choose as a video window only the second half of a full bar. Is there any way to get rid of the grey indications or make them completely non-visible? They are a big nuisance.