Add the following menu configuration element to your custom .xxe file:
<menu label="-"> <insert /> </menu>
Attribute label is required. The value - simply means that you do not want to change the original label of the menu.
After the insert element, add one or more separator and/or item and/or menu elements. Example:
<menu label="_DocBook">
  <insert />
  <separator />
  <item label="TEST #_1" icon="xxe-config:common/icons2/help.gif"
        command="alert" parameter="TEST #1" />
  <separator />
  <menu label="SUBMENU">
    <item label="TEST #_2"
          command="alert" parameter="TEST #2" />
  </menu>
</menu>The icon attribute is optional for item elements.
The "_" character in the label attribute is optional. It is used to specify the position of the menu mnemonic, if any.