EXFO MAX-700 - Manual (Page 176)

Analyzing Traces and Events
164 MAX-700
Opening Trace Files
If you want to keep the current zoom and markers, you must save your file
before opening another one.
As soon as a reference trace is open, the application will apply the zoom
and marker settings of the reference file to all traces (main and reference).
For detailed information on compatibility between EXFO’s file formats and
software versions, see OTDR Trace File Compatibility on page 182.
For information on how to navigate between traces, see Displaying or
Hiding a Trace on page 132.