The Word interface doesn't let you do it directly unless you are using the Repeating Section Content Control in which case you can create 2nd, 3rd etc instances of the same element. You don't NEED to use the content control toolkit but it might be easier than the alternatives.

Your choices when you don't have access to the Content Control Toolkit are:
1. Close the document and use a Zip file editor to edit the embedded xml file directly
2. Use a macro to add an element.

I would recommend you add a namespace to the xml file so you don't keep adding xml files that are not explicitly findable.

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Andrew Lockton
Chrysalis Design, Melbourne Australia