system-start-delimiter-interface

The brace, bracket or bar in front of the system.

User settable properties:

collapse-height (dimension, in staff space)

Minimum height of system start delimiter. If equal or smaller, the bracket is removed.

style (symbol)

This setting determines in what style a grob is typeset. Valid choices depend on the stencil callback reading this property.

thickness (number)

Line thickness, generally measured in line-thickness.

This grob interface is used in the following graphical objects: SystemStartBar, SystemStartBrace, SystemStartBracket and SystemStartSquare