LilyPond program-reference: 3.1.112 Tie

### 3.1.112 Tie

Tie objects are created by: Completion_heads_engraver and Tie_engraver.

Standard settings:

> `control-points` (list):

>   `ly:tie::calc-control-points`

>   List of offsets (number pairs) that form control points for the tie, slur, or bracket shape. For Béziers, this should list the control points of a third-order Bézier curve.

> `springs-and-rods` (boolean):

>   `ly:spanner::set-spacing-rods`

>   Dummy variable for triggering spacing routines.

> `avoid-slur` (symbol):

>   `'inside`

>   Method of handling slur collisions. Choices are `around`, `inside`, `outside`. If unset, scripts and slurs ignore each other. `around` only moves the script if there is a collision; `outside` always moves the script.

> `direction` (direction):

>   `ly:tie::calc-direction`

>   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`.

> `neutral-direction` (direction):

>   `1`

>   Which direction to take in the center of the staff.

> `stencil` (unknown):

>   `ly:tie::print`

>   The symbol to print.

> `font-size` (number):

>   `-6`

>   The font size, compared to the ‘normal’ size. `0` is style-sheet’s normal size, `-1` is smaller, `+1` is bigger. Each step of 1 is approximately 12% larger; 6 steps are exactly a factor 2 larger. Fractional values are allowed.

> `thickness` (number):

>   `1.2`

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

> `line-thickness` (number):

>   `0.8`

>   The thickness of the tie or slur contour.

This object supports the following interface(s): tie-interface, spanner-interface and grob-interface.

#### Internals Reference