The Instant Agenda Retrospective Meeting comes with 10 different default Category templates. These Category templates are great because you can use them to quickly mix up the style of your Retrospective Meetings. For more information about these default categories, see Top 10 Retrospective Templates.
Create a Retrospective Meeting, and then click Category Templates.
The Category Templates window lists all the Category templates you can apply to your meeting. The only restriction is you cannot apply a Category template if you have ideas on your board.
For more information about Retrospective Meeting categories, see, How and when should I edit my Retrospective Meeting categories?