Create Custom CSV Download Button in Interactive report

How to create custom CSV Download button in Interactive report?

1) Create Interactive report.

2) Create Custom download button.

3) Go to Button behavior Action and select Redirect to page in this application.
4) Click Target and Target type as Page in this application and page as which we have create button page no. like 6.
5) Click advance and type as "CSV" in Request.

Another Method :

1) follow the up to 2nd  steps and select Redirect to URL in Action.
2) URL paste it as per screen shot and mention correct page no in the URL.