As @karloluis named is possible doing it without any plugins.
But is quite confusing, and I had trouble finding the right way to do it, so I just try to explain it here for future users.
Just in the URL of the endpoint in the section you want to change to be a request parameter, just start to type "req" and wait for the autocomplete to appear.

In this list you should choose Request --> Query Parameter, so you can configure it in the proper way.

If you have set a value for the request param in the query list, in my case type you should be able to see it in the preview of the request param.

Finally, remember to disable the query in the list, so is not duplicated.
