### 3.1.120 TabNoteHead

TabNoteHead objects are created by: Tab_note_heads_engraver.

Standard settings:

> `details` (list):

>   `'((cautionary-properties (angularity . 0.4) (half-thickness . 0.075) (padding . 0) (procedure . #<procedure parenthesize-stencil (stencil half-thickness width angularity padding)>) (width . 0.25)) (head-offset . 3/5) (harmonic-properties (angularity . 2) (half-thickness . 0.075) (padding . 0) (procedure . #<procedure parenthesize-stencil (stencil half-thickness width angularity padding)>) (width . 0.25)) (repeat-tied-properties (note-head-visible . #t) (parenthesize . #t)) (tied-properties (break-visibility . #(#f #f #t)) (parenthesize . #t)))`

>   Alist of parameters for detailed grob behavior. More information on the allowed parameters for a grob can be found by looking at the top of the Internals Reference page for each interface having a `details` property.

> `direction` (direction):

>   `0`

>   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`.

> `duration-log` (integer):

>   `note-head::calc-duration-log`

>   The 2-log of the note head duration, i.e., `0` = whole note, `1` = half note, etc.

> `font-series` (symbol):

>   `'bold`

>   Select the series of a font. Choices include `medium`, `bold`, `bold-narrow`, etc.

> `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.

> `stem-attachment` (pair of numbers):

>   `'(0.0 . 1.35)`

>   An `(x . y)` pair where the stem attaches to the notehead.

> `stencil` (stencil):

>   `tab-note-head::print`

>   The symbol to print.

> `whiteout` (boolean):

>   `#t`

>   If true, the grob is printed over a white background to white-out underlying material, if the grob is visible. Usually #f by default.

> `X-offset` (number):

>   `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:staff-symbol-referencer::callback> >`

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

This object supports the following interface(s): font-interface, grob-interface, item-interface, note-head-interface, rhythmic-grob-interface, rhythmic-head-interface, staff-symbol-referencer-interface, tab-note-head-interface and text-interface.

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