Bar width after system break

I would like to have a tutorial on “engrave mode”. Is there ready made video somewhere. I couldn’t find one yet. My trouble is that I can’t find a way to line up the last bar to the rest on the same sheet after I choose “move staff to next system”. The last bar in the “system break” always comes shorter than the rest in space.

Welcome to the forum, Ingrid. Is the problem that after you create a system break near the end of your piece, the final system no longer reaches all the way across the page to the right-hand margin? If so, try switching off Only justify final system in flow when more than n % full on the Note Spacing page of Layout Options.