An ambitus indicates the range of notes included within a stave. It is used to indicate the appropriate voice for a particular part. See Wikipedia: Ambitus.
To create an ambitus choose one of the following methods:
The top and bottom notes of the range can be manually adjusted via Properties.
Four different properties of the ambitus can be manually altered:
1. style: vertical or diagonal
2. notehead type
3. notehead duration
4. line thickness of the line joining the two noteheads