I don't believe it's configurable. You'd need to use standard customization techniques to locate the required idoc include in the appropriate template and override it as necessary.
If you need help getting started, I would very strongly recommend reading at least the table of contents in all of the Content documentation, read the developer's guide, search this forum for similar topics (I 100% guarantee that you can find samples in this forum), and finally, this book is still the primary non-oracle resource for this information: The Definitive Guide to Stellent Content Server Development: Brian Huff: 9781590596845: Amazon.com: Books . It's a bit dated in terms of versions, but the customization techniques are still sound.
Hope this helps,