div class="doc"><p>Generic document editor with a dynamic viewport.</p><p>This editor bounds vertical view scrolling (see <code><a href="WEditor-Base-Viewer.html#t:ViewAction" title="WEditor.Base.Viewer">ViewAction</a></code>) to keep the
   cursor within view.</p></div><div class="subs instances"><h4 class="instances details-toggle-control details-toggle" data-details-id="i:EditingDocument">Instances</h4><details id="i:EditingDocument" open="open"><summary class="hide-when-js-enabled">Instances details</su