Grouped staves have an important characteristic: 
 instead of drawing barlines only on the staves, the barlines can either 
 be drawn through or between staves in a group.
        Make sure you’re in Scroll View before 
 you begin; if you’re not, choose Scroll View from the View menu (in case staves have been hidden).
        
        
            - Click the Staff tool   . The Staff menu 
 appears. . The Staff menu 
 appears.
- If you haven’t yet created the group, do so 
 now. See Groups-To group staves.
- Click a group handle, then, from the Staff menu, choose Edit Group 
 Attributes. Or, double-click a group handle. 
 (Or, choose Edit Group Attributes from the Staff menu without selecting 
 a group.) To display the attributes of another group, use the arrow controls 
 to select another Group ID number.
- Use the Draw Barlines drop-down 
 list in the Group Attributes dialog box to specify 
 how you want barlines to appear for this group. To draw the barline 
 only within each staff, and not connect each staff with the barline, choose 
 Only on Staves from the drop-down list. To draw a barline as one 
 continuous line passing through all the staves in the group, choose Through 
 Staves. To draw a barline between staves, but not through the staff lines 
 themselves, choose Only Between Staves (Mensurstriche).
            - Click OK to confirm your barline settings.