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.. _configure-PreviewHTML:
********************************
The PreviewHTML output processor
********************************
The options below control the operation of the PreviewHTML output
processor that is run when you include ``"output/PreviewHTML"`` in the
`jax` array of your configuration or load a combined configuration
file that includes the PreviewHTML output jax. They are listed with their default
values. To set any of these options, include an ``PreviewHTML`` section
in your :meth:`MathJax.Hub.Config()` call. For example
.. code-block:: javascript
MathJax.Hub.Config({
PreviewHTML: {
scale: 120
}
});
would set the ``scale`` option to 120%.
.. describe:: scale: 100
The scaling factor (as a percentage) of math with respect to the
surrounding text. The `PreviewHTML` output processor tries to match
the ex-size of the mathematics with that of the text where it is
placed, but you may want to adjust the results using this scaling
factor. The user can also adjust this value using the contextual
menu item associated with the typeset mathematics.
.. describe:: minScaleAdjust: 50
This gives a minimum scale (as a percent) for the scaling used by
MathJax to match the equation to the surrounding text. This will
prevent MathJax from making the mathematics too small.
.. describe:: mtextFontInherit: false
This setting controls whether ``<mtext>`` elements will be typeset
using the math fonts or the font of the surrounding text. When
``false``, the font for ``mathvariant="normal"`` will be used;
when ``true``, the font will be inherited from the surrounding
paragraph.
.. describe:: linebreaks: {}
This is an object that configures automatic linebreaking in the
PreviewHTML output. In order to be backward compatible with earlier
versions of MathJax, only explicit line breaks are performed by
default, so you must enable line breaks if you want automatic
ones. The object contains the following values:
.. describe:: automatic: false
This controls the automatic breaking of expressions: when
``false``, only ``linebreak="newline"`` is processed; when
``true``, line breaks are inserted automatically in long
expressions.
.. describe:: width: "container"
This controls how wide the lines of mathematics can be.
Use an explicit width like ``"30em"`` for a fixed width.
Use ``"container"`` to compute the size from the containing
element.
Use ``"nn% container"`` for a portion of the container.
Use ``"nn%"`` for a portion of the window size.
The container-based widths may be slower, and may not produce
the expected results if the layout width changes due to the
removal of previews or inclusion of mathematics during
typesetting.
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