Hi Peter,

The editor has public member variable Element which contains reference to the outer element (it can be INPUT or TABLE depending on buttons).

So, you may set title attribute for it. You can get reference to editor using igedit_getById(clientID_ofEditor), or using first param in ClientSideEvents. Below is example to set initial tooltip and change it dynamically on value change.

<script type="text/javascript">
function WebNumericEdit1_ValueChange(oEdit, oldValue, oEvent)
{
 oEdit.Element.title = 'value in editor:' + oEdit.getValue();
}
function WebNumericEdit1_Initialize(oEdit, oldValue, oEvent)
{
 oEdit.Element.title = 'my tooltip';
}
</script>
<igtxt:WebNumericEdit ID="WebNumericEdit1" runat="server">
   <ClientSideEvents ValueChange="WebNumericEdit1_ValueChange" Initialize="WebNumericEdit1_Initialize" />
</igtxt:WebNumericEdit>