EXFO FastReporter 2 - Manual (Page 88)

Working with Projects (FR2-FC Mode)
78 FastReporter 2
Working in Loopback Mode
9. Select whether the loop will be automatically detected, or if you want
to do so manually. If you select the automated mode, enter a length
value for the loop.
10. If you are in Manual mode, set the loopback start and end elements:

Click on the element or section that you want to use as the start
element, then click Set Loop Start. The selected elements will
bear LS to indicate their statuses.

Click on the element or section that you want to use as the end
element, then click Set Loop End. The selected elements will bear
LE to indicate their statuses.

If you want to use a section to set the loop start and end values,
select it, then click Set Loop Section. The loop start and end will
be placed on the event before and after the section.