reports - group by device?

I have a report of sensors from various devices.

Is there an "easy" way to group the report contents by device?

I have all sensors from several devices, but they are just printed one after another. Creating a separator with the device the sensors pertain to would be nice.

Looking through the controls, I didn't see anything and all I found was information about recoding the HTML templates.

Is that all there is?

Thanks, Chuck