EXFO FTB-7000 OTDR for FTB-200 v2 - Manual (Page 139)

Analyzing Traces and Events
OTDR 125
Using Zoom Controls
according to the zooming type you have selected. All of the other zoom
buttons (except for the zoom on selected event button) will reflect your
selection and behave accordingly.
³
You can zoom in or out on the graph by first using, respectively,
the or the button, and then by pressing the location where
you want to zoom on the graph with the stylus or your finger.
The application automatically adjusts the zoom by a factor 2 around
the point that was pressed.
To revert to the complete graph view:
Press the
button.
Note: If the Zoom in automatically on defined fiber span feature is selected in the
OTDR setup, the application will zoom in between span start and span
end.
To automatically zoom in on the selected event:
1. Go to the Events tab.
2. From the events table, select the desired event.
3. Press the button to zoom in. Press the button again to zoom
out.