### 3.1.89 RehearsalMark

RehearsalMark objects are created by: Mark_engraver.

Standard settings:

> `after-line-breaking` (boolean):

>   `ly:side-position-interface::move-to-extremal-staff`

>   Dummy property, used to trigger callback for `after-line-breaking`.

> `baseline-skip` (dimension, in staff space):

>   `2`

>   Distance between base lines of multiple lines of text.

> `break-align-symbols` (list):

>   `'(staff-bar key-signature clef)`

>   A list of symbols that determine which break-aligned grobs to align this to. If the grob selected by the first symbol in the list is invisible due to break-visibility, we will align to the next grob (and so on). Choices are `left-edge`, `ambitus`, `breathing-sign`, `clef`, `staff-bar`, `key-cancellation`, `key-signature`, `time-signature`, and `custos`.

> `break-visibility` (vector):

>   `#(#f #t #t)`

>   A vector of 3 booleans, `#(end-of-line unbroken begin-of-line)`. `#t` means visible, `#f` means killed.

> `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`.

> `extra-spacing-width` (pair of numbers):

>   `'(+inf.0 . -inf.0)`

>   In the horizontal spacing problem, we pad each item by this amount (by adding the ‘car’ on the left side of the item and adding the ‘cdr’ on the right side of the item). In order to make a grob take up no horizontal space at all, set this to `(+inf.0 . -inf.0)`.

> `font-size` (number):

>   `2`

>   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.

> `non-musical` (boolean):

>   `#t`

>   True if the grob belongs to a `NonMusicalPaperColumn`.

> `outside-staff-horizontal-padding` (number):

>   `0.2`

>   By default, an outside-staff-object can be placed so that is it very close to another grob horizontally. If this property is set, the outside-staff-object is raised so that it is not so close to its neighbor.

> `outside-staff-priority` (number):

>   `1500`

>   If set, the grob is positioned outside the staff in such a way as to avoid all collisions. In case of a potential collision, the grob with the smaller `outside-staff-priority` is closer to the staff.

> `padding` (dimension, in staff space):

>   `0.8`

>   Add this much extra space between objects that are next to each other.

> `self-alignment-X` (number):

>   `0`

>   Specify alignment of an object. The value `-1` means left aligned, `0` centered, and `1` right-aligned in X direction. Other numerical values may also be specified.

> `stencil` (stencil):

>   `ly:text-interface::print`

>   The symbol to print.

> `vertical-skylines` (pair of skylines):

>   `#<unpure-pure-container #<primitive-procedure ly:grob::vertical-skylines-from-stencil> >`

>   Two skylines, one above and one below this grob.

> `X-offset` (number):

>   `#<simple-closure (#<primitive-generic +> #<simple-closure (#<primitive-procedure ly:break-alignable-interface::self-align-callback>) > #<simple-closure (#<primitive-procedure ly:self-alignment-interface::x-aligned-on-self>) >) >`

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

> `Y-extent` (pair of numbers):

>   `#<unpure-pure-container #<primitive-procedure ly:grob::stencil-height> >`

>   Extent (size) in the Y direction, measured in staff-space units, relative to object’s reference point.

> `Y-offset` (number):

>   `#<unpure-pure-container #<primitive-procedure ly:side-position-interface::y-aligned-side> #<primitive-procedure ly:side-position-interface::pure-y-aligned-side> >`

>   The vertical amount that this object is moved relative to its Y-parent.

This object supports the following interface(s): break-alignable-interface, font-interface, grob-interface, item-interface, mark-interface, self-alignment-interface, side-position-interface and text-interface.

#### Internals Reference v2.18.2 (稳定分支).