</dd>


<dt>y_zero</dt>
<dd><p>For a numeric y variable, TRUE or FALSE of whether the minimum of the y scale is zero. Defaults to TRUE.</p></dd>


<dt>y_zero_line</dt>
<dd><p>For a numeric y variable, TRUE or FALSE whether to add a zero reference line to the y scale. Defaults to TRUE if there are positive and negative values in y_var. Otherwise defaults to FALSE.</p></dd>


<dt>facet_labels</dt>
<dd><p>A function or named vector to modify facet scale labels. Defaults to converting labels to sentence case. U