EXFO FTB-8500 Series for FTB-500 - Manual (Page 336)

RFC 2544 Tabs
322 FTB-8500 Series and FTB-8120NGE/8130NGE
Graph

Displayed Results: Select the displayed results mode: Current,
Minimum, Maximum, or Average. The default setting is Current.

Legend: Indicates the legend used for the graph according with the
direction selected.