This template is not blank, it adds a little icon in the top-right corner. See?

This template adds your username to Category:Wikipedia rollbackers.

Place {{Rollback topicon}} anywhere on your user page to indicate that you have the Rollback user right.

This icon is based on {{Top icon}}.

{{Rollback topicon
| nocat = yes         = disables the automatically added category (default = no)
}}