Left Justification of all systems

MuseScore 3.6.2

A friend has asked me to alter the layout of an existing piece of sheet music to focus on its form and structure as an educational exercise, as opposed to a conventional layout from which one would normally play.

To accomplish what he wants, I have inserted system breaks to separate various sections of the music. This forces all measures to stretch to fill the page width. Is there a way to left-justify any or all systems to emphasize the artificial nature of the layout?

I have looked under Format > Page Settings, and Format > Style > Page, Score & System to no avail. I've searched these fora for any suggests and can't find anything but my google-fu isn't strong. I thought I remember a Ask-Me-Anything Musescore Café episode where this may have been discussed, but only as it related to the final system.