How do I stretch out these last three measures

How do I get this last line of music to line up correctly? I try going into engrave and selecting the horizontal drag tool but it doesn’t seem to work.

A. The Note Spacing tool works fine, but you have to use the keyboard shortcuts (Shift-Alt-Right; add Cmd/Ctrl for bigger distances).

B. In Layout Options > Note Spacing there’s a setting to justify the final system of each flow. If you use this, you don’t need to use the Note Spacing tool each time.

Thank you so much!

Original attached score deleted to protect someone’s ip. Score was six measure long with 4 instruments. 3 measure per stave on the paper and the top was justified but the bottom was not.