Removing brushstroke selection outlining

Hi all! May not be phrasing this right, but there must be some incredibly simple way to do this lol.

I’m trying to remove the selection highlighting on individual brushstrokes so that I can more accurately resize and position shading for line art.
Is there a way to toggle the contour highlighting completely off? I was wondering if this is by “removing contour strokes”, and if that also deletes your line history? Regardless, if anyone can explain any method, I would greatly appreciate it!

Pictures are included below, thanks in advance for the help!