A Confluence admin can set up what parameters a report will ask for in the admin interface of VisualScript. You can learn more about that by reading this article:
When you add a report to your page, you'll see these parameters when you first Run the report.
If you have the rights to edit the page, you can change the values of these parameters any time. Let's say you want the same report, but from a different Space or different set of pages.
To change the report, you have to edit the page, click "Edit" on the inserted Macro and click on "Change Report."
Change the values and click Run to run the report again with the new values.