How to work with Include Indirects prompt?

Summary

Would like to control direct or indirect based on parameter / prompt?

Content

Dear All,

I am bit new to BI Analytics and hence this might sound stupid question. I have been working with BI Publisher in which I could play with parameters in SQL queries easily.

I could work out a analysis using Assignment Management folder and it works all ok. If I select Top Level Manager I get all people reporting to them direct or indirect.

I would like to give one parameter to End User to select only direct or all hierarchy in analysis. I am somehow stuck at this level.