I’m still wondering why Dorico often refuses to place one more system on a page even though there’s plenty of room and there’s no setting or formatting addition which should be preventing it. It means that I often have to resort to manual frame breaks to force another system onto a page, even though the resulting page shows only 95% full.
Just now I had an even stranger experience while entering lyrics. The layout was a vocal score with only one singer and piano and there’s plenty of room for 5 systems. A layout with only 4 systems per page often shows the page to be only 75% full. While entering the lyrics, I could see the layout jumping about wildly, sometimes allowing 5 systems on subsequent pages and after entering the next syllable, jumping back to only 4, although not on all pages. I was watching carefully and it was not as though some of these [smaller] syllables could be causing any formatting changes, either horizontally or vertically. So what in heaven’s name is Dorico doing?!