Access optional Report Filter in report

I have a report with an optional Filter and 2 Options.
I want the selected filter value to show in report header. I see the 2 options - which I’ve added to the header, but I cannot find how to add the report FILTER.

This post might help

Thank you! I assumed since we were forced to use these ‘BAQ Report’ interfaces to create a report that they would have that functionality built in… I will try the custom code route.
Thanks again.