EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 235)

Analyzing Traces with the Bidirectional Analysis Application
OTDR 221
Using Zoom Controls
Using Zoom Controls
You can use the zoom controls to change the scale of the trace display.
You can zoom in on or out of the graph using the corresponding buttons or
let the application automatically adjust the zoom on the currently selected
event from the events table.
You can also return to the original graph value.
Note: You cannot move the markers with the button.
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In the case of a multiwavelength file, when you zoom in or out on the
graph, the application will apply the new zoom context (zoom factor,
selected area, and selected event when applicable) to the other
bidirectional measurements (wavelengths). Only the zoom context of
the bidirectional measurement will be saved along with the
bidirectional file.
Selection mode
Move view area
Zoom selector
Zoom in
Full view
Zoom out
Automatic zoom on
currently selected event