Bar line
Change bar line type
Bar lines are changed by dragging a bar line symbol from the bar line palette to a bar line in the score.

To hide a bar line entirely, right-click on the line and choose Set Invisible.
Create grand staff
To extend bar lines over multiple staves, double-click on a bar line to edit it (see Edit mode).

Click and drag the blue square down to the next staff.
Staff bar lines updates appear when you leave edit mode.

See also: Measure operations