I know this si kind of stupid but the curiosity is rising. I just realized in the EOS 1 line pictures, there is no quick control dial. I've gazed at these cameras so much before but I just never noticed the absence of the dial until now. So my question is, how do they change between P, Av, Tv, and M modes? I mean, having to do it through a menu system would be a step back wouldn't it?