Starting the Analysis Mode

By default the oscilloscope is in acquisition mode, i.e. it displays the data generated by the experiment. There is also an analysis mode, to analyze your data further. Analysis mode is only available when the experiment is stopped or paused.

In the Edit menu, select Analyse measure data.
Or
Press <Ctrl> + <v>.
Two vertical lines appear in the display area. The originally left line is number 1, the other is number 2. These lines are the measurement cursors, which define two points at which data is measured. The active measurement cursor is yellow, the other one is gray.
At the bottom of the oscilloscope window, the time values, i.e. the position of both cursors on the x axis, as well as their difference, are shown.