LilyPond Internals Reference: 3.1.113 SystemStartSquare

### 3.1.113 SystemStartSquare

SystemStartSquare objects are created by: System_start_delimiter_engraver.

Standard settings:

> `direction` (direction):

>   `-1`

>   If `side-axis` is `0` (or `#X`), then this property determines whether the object is placed `#LEFT`, `#CENTER` or `#RIGHT` with respect to the other object. Otherwise, it determines whether the object is placed `#UP`, `#CENTER` or `#DOWN`. Numerical values may also be used: `#UP`=`1`, `#DOWN`=`-1`, `#LEFT`=`-1`, `#RIGHT`=`1`, `#CENTER`=`0`.

> `stencil` (stencil):

>   `ly:system-start-delimiter::print`

>   The symbol to print.

> `style` (symbol):

>   `'line-bracket`

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

> `thickness` (number):

>   `1.0`

>   Line thickness, generally measured in `line-thickness`.

> `X-offset` (number):

>   `ly:side-position-interface::x-aligned-side`

>   The horizontal amount that this object is moved relative to its X-parent.

> `Y-extent` (pair of numbers)

>   Hard coded extent in Y direction.

This object supports the following interface(s): font-interface, grob-interface, side-position-interface, spanner-interface and system-start-delimiter-interface.

#### Internals Reference