I'm not sure about the expansion part, but zooming in can be done in cc3+ (I use it too). In fact, in the Tome of Ultimate Mapping, there is a section that specifically explains how to do it. The tome can explain much better than I. It you basically create a box around the area you want, then copy it to the clipboard. Once you've done that, you create a new map, and then paste. There is a way to make sure it fits to the smaller map, but I don't remember whF that is.

I would highly suggest you get the tome. It can answer most of your questions