EXFO OTDR 2 - Manual (Page 119)

Analyzing Traces and Events
OTDR 111
Using Zoom Controls

You can zoom in or out on the graph by first using, respectively,
the or the button, and then by tapping 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 tapped.
To revert to the complete graph view:
Tap the
button or double-tap the graph overview window when it is
displayed.
To automatically zoom in on the selected event:
1. Select the desired event:

From the OTDR tab: place marker A on the event

From the Events tab: select the item from the table

From the Measure tab: go to the Events tab to select the item from
the table, and then go back to the Measure tab.
2. Tap the button to zoom in.