ion</a> c</li><li class="src short"><a href="#v:viewerShiftUpAction">viewerShiftUpAction</a> :: Int -&gt; <a href="WEditor-Base-Viewer.html#t:ViewerAction" title="WEditor.Base.Viewer">ViewerAction</a> c</li><li class="src short"><a href="#v:viewerShiftDownAction">viewerShiftDownAction</a> :: Int -&gt; <a href="WEditor-Base-Viewer.html#t:ViewerAction" title="WEditor.Base.Viewer">ViewerAction</a> c</li></ul></details></div><div id="interface"><h1>Documentation</h1><div class="top"><p class="src"><span class="