You can find options for the project-wide appearance of rests on the Rests page in Engraving Options.
The options on the Rests page allow you to change the style, appearance, width, and precise position of rests. You can also change the appearance and design of multi-bar rests, such as choosing to hide or show H-bars and bar counts on single bar rests and how to display multi-bar rests at the end of flows. For example, the default appearance of multi-bar rests at the end of flows is to show “tacet al fine”, but you can show the total bar count instead.
There are musical examples for many options to demonstrate how they affect the appearance of your music.