I agree. It would be really great if you could choose the amount of channels and time period you want.
When I'm programming the channels to record I do it sitting behind the computer, so a really small size works the best due to the fact you can see everything (overlap and stuff). One of the main reasons I haven’t fully switched to MP is because it’s hard getting a good overview
I think it would be a good idea to make the size control available using the skin engine, just like it is with the switching between thumbnail size. It would be nice to be able to switch and (although I don't know if this is the case with the music icons) to let the skinner decide between the sizes. This way a skinner can make a good skin specifically for people only using there TV or for people only using there computer screen.