EXFO FTB-700 for FTB-1 - Manual (Page 111)

Analyzing Traces and Events
OTDR 103
Graph View
You can change trace display parameters (such as the grid and zoom
window display). For more information, see Setting Trace Display
Parameters on page 122.
You can view all of the traces, in turn, in both the Trace Info pane and the
trace display with the navigation buttons. For more information, see
Displaying or Hiding a Trace on page 126.
Each wavelength is displayed in a different color. The colors are assigned
dynamically. Wavelengths of the reference traces are also displayed using
the colors corresponding to those of the main trace, but with a darker
shade.