After you finish a trip, you can either analyze or just look over what you have been through. The functionality Track analyzer shows you altitude profile of the trip, renders the trip on the map and you can mark any part of the trip, highlighting the part you have marked.
This functionality works the same when planning a trip.
Example 1: You imported a GPX file into Orbis. You are eager to follow the track from the file, because the description read awesome. However, your fellows aren't that convinced and think it would be too steep and too wearing. The map doesn't bring conclusion - the contours are really close to each other on several places along the track. So, you run Orbis, open the map and switch to Track analyzer mode. You load the track onto the map and, thanks to the three-dimensional way the map is rendered, show the fellows the track is not that bad and convince them to go with you.
Example 2: You went on a trip. You planned the trip by a map, and took Orbis with to provide information about current position and speed. Yet, despite the track looked normal in the map, you had to overcome a remarkably high pass. Well, after you got home, you want to know, how high the damn pass was. Orbis is still running, so you just switch to Track analyzer and it shows you altitude profile of the current track. And there it is! The graph grows from 500 to some 1200 meters!