You can add staffs to a staff style, allowing you to create a two-staff piano style from a single-staff style, for example.
A staff can display multiple independent melodic lines, called voices. Some predefined staff styles display only a single voice, while others can display multiple voices (these are called polyphonic). You can choose polyphonic staff styles to display multiple voices (for choirs or polyphonic instruments), and can add voices to a staff style to display independent lines. Theoretically, a staff style can display up to 16 independent voices (but this may not be readable).
You can also duplicate staffs or voices.
Click the Add Staff button (+) in the Staff section of the Staff Style window.
A new staff is added below the selected staff. If no staff is selected, the staff is added above the first (highest) staff in the staff style.
Click the Add Voice button (+) in the Voice section of the Staff Style window.
A new voice is added below the selected voice. If no voice is selected, the voice is added above the first (highest) voice in the staff. If a staff is selected, the voice is added above the first (highest) voice in the staff.
Select the voice or staff in the Staff Style window, then press Delete (or choose Edit > Delete).
When you delete a staff, all the staff’s voices are deleted.
Each staff is represented by an ID number. The ID numbers are assigned automatically and cannot be changed.