Hi,

WebSplitter does not process keyboard events and does not do any action on 'shortcuts'.

Application may process keyboard events (for form or similar object) and do collapse expand on its own. For example, in order to toggle collapsed state of pane 2 of WebSplitter1 on Alt+A, application may do something like below:

function globalKeyDownEvent(evt)
{
  if(evt.altKey && evt.keyCode == 65)
  {
   var splitter = $find('<%=WebSplitter1.ClientID%>');
   var pane2 = splitter.get_panes()[1];
   pane2.set_collapsed(!pane2.get_collapsed());
  }
}