 of:</p><ul><li><p><code>NULL</code> for no breaks</p></li>
<li><p><code><a href="waiver.html">waiver()</a></code> for the default breaks computed by the
    transformation object</p></li>
<li><p>A numeric vector of positions</p></li>
<li><p>A function that takes the limits as input and returns breaks
    as output</p></li>
</ul></dd>


<dt>minor_breaks</dt>
<dd><p>One of:</p><ul><li><p><code>NULL</code> for no minor breaks</p></li>
<li><p><code><a href="waiver.html">waiver()</a></code> for the default brea