ig-paren">)</span><a class="headerlink" href="#std.ModifyFrame" title="Permalink to this definition"></a></dt>
<dd><p>The <em>selector</em> function is called for every single frame and can modify the
properties of one of the frames gotten from <em>clips</em>. The additional <em>clips</em>’
properties should only be read and not modified because only one modified
frame can be returned.</p>
<p>You must first copy the input frame to make it modifiable. Any frame may be
returned as long as it has the same