You can find per-flow options controlling how rests are positioned and notated, and when rests are shown, on the Rests page in Notation Options.
For example, you can change whether bar rests are shown in additional voices, when dotted rests are permitted, and the default positions of rests in different contexts. You can also change whether rests of the same duration and at the same rhythmic position in different voices are consolidated into a single rest.
Musical examples demonstrate how each option affects the appearance of your music.