So I created 3 separate dashboards where each successive dashboard is the next level of dynamic drilldown. I click on a value and it drills down to the next level and the next dashboard.
I would like to create a, lets call it a reset button. I'd put it on the second and third levels and it would link back to the first, for when I don't want to drill down any further.
You can use a html module of simple xml to create hyperlink which will redirect to your original/first dashboard.