If an included file is referenced multiple times in a program (in different structures, for example), you can use the arrows in the upper right-hand corner of the Source pane to navigate between each occurrence of an included construct in the Context pane.
In the Source pane, click on the construct in the included file. The numbers in the upper right-hand corner show the sequence number of the current construct versus the total number of constructs. The notation "2/3," for example, identifies the second occurrence of a construct that occurs three times. Use the arrows to navigate between each occurrence.