Frame breaks
Frame breaks occur when musical material reaches the right page margin at the bottom of a frame and must continue on a new system in the next frame in the music frame chain, which is usually on the next page. Dorico for iPad automatically arranges music in frames so that systems are correctly spaced and legible, but you can also control frame breaks manually, for example, to insert page turns at specific positions in part layouts.
Frame breaks that you have inserted manually are indicated by signposts, which you can hide/show at any time. They are also layout-specific, meaning each layout can have frame breaks at different rhythmic positions.
You can also control the content of music frames by fixing the number of systems per music frame in each layout.