Changing scale or spacing for individual bars or pages

Problem is described here (I'd do it again but reading this is probably clearer): https://musescore.org/en/node/215081#comment-730711

I understand that a single bar that's smaller than the one next to it would look weird, but an entire page (possibly between two manual page breaks) should be able to be resized. It can be really frustrating to have to make up for a single page by altering all the other pages.