You can search for all the tracks in a particular region of the map. To do this, hold the Control Key and draw a region on a Map Pane. This will present a dialog box showing all the GPS tracks which have points in the selected area:
This dialog will show the maximum, minimum, or average values for tracks in the selected area. For example, if 5 tracks cross the area, you can see where the maximum speed for each track was. The point will be displayed on a Map Pane when you select a track in the list on the right side.
You can also find data extremes for other values such as heart rate or estimated power.