Change job owner for job owned by a report server process

Question on a SQL 2008 Enterprise Edition (64-bit)

I have changed the owner of a couple of jobs (owned by a report server process) using Management Studio. The new user has sysadmin role just like the previous one had.

Then I kept thinking on the job's legend: "This job is owned by a report server process. Modifying this job could result in database incompatibilities. Use Report Manager or Management Studio to update this job."    

Did I do it at the right place or I had to do it at the Report Manager?

I went to report manager and I was not able to find where I could change this.

So, Did I do it at the right place by doing it at Management Studio?

Thanks!

Paulino