To export a region on a map, zoom in to the desired region; then, right-click a track, and select Export track region:

The Export dialog will open, and the track you right-clicked will be automatically selected. In addition to the common export options for the chosen track, the dialog displays the standard Map region selector at the top:

As you modify the selected export range, the preview table will automatically update with features (in this example, annotations) located inside this range on the map.

Exporting highlighted regions

If the track contains highlights, you can right-click inside a highlight, then select Export highlighted region to pref-fill the range selector with the highlighted region's coordinates: