Visible Zone Outlines

Would it be possible to make zone outlines visible to make setting up zones more convenient? I normally use the zone domes to see the outline for zones with a radius but for squares/rectangles I have to keep guessing where the zone edges are and it's a little hard to predict.

Enter this zone, run /zone_edit command, and then you will see it

 

Oh duh, idk why I didn't think of that. Thanks!