How to configure Word Backstage view?

Word Backstage View

The <backstage> node defines the items that appear in the Word File menu. The <backstage>
node is a child of <Ribbon>\<customUI>. See 4.4.14 for details.

The example below is specific for Word 2010 Backstage View

<Ribbon>
<customUI>
      <backstage>
            </backstage>
</customUI>
</Ribbon>

The example below is specific for the Backstage View in Word 2013 or later.

<Ribbon>
<customUI>
      <backstage2013>
            </backstage2013>
</customUI>
</Ribbon>