EXFO iOLM - Manual (Page 129)

Managing Results
intelligent Optical Link Mapper 123
Viewing Element and Section Details

In loopback mode, the application displays the link start (A), the
loop start (LS), the loop middle (LM) or the loop end (LE) and the
link end (B). You can navigate through the split measurement and
the original measurement by selecting the appropriate icon at the
top of the link view.

Position: The position of the selected element in the link. The
position 0.00 is set on the first element when the launch fiber is
present.
Note: When an element is selected through Elements table, automatically the
corresponding element of the link view will get selected
Note: The items available in the list depends on the characteristics of the selected
element. It may not be possible to change the element type.