I have always used the Streets & Trips menu bar - View/Zoom/To entire route - to get to an overview of my itinerary and then zoomed down to the location I wanted to look at closer using my mouse rotor.
What I had not noticed until recently is that you can accomplish the same thing(s) by clicking on the Summary line in the Directions [to get the overall itinerary view], and you can zoom down to a location by double clicking an Arrive or Depart line in Directions.
Probably "old hat" to some users, but thought I would mention it.