Yes, selecting PAN works (at the moment that’s the only way I can think of to get a pan rotary at all, and that is much nicer than selecting each channel in the routing screen). But it would be nicer to have the option of having that control available without having to select a mix first.
After all, you can get a send level on the rotary by pressing the SENDS button and choosing a mix, but someone still thought that it was valuable to be able to call up a specific send level on the rotaries without selecting a mix first.