Teledyne LeCroy WaveRunner МXi-A Getting Started Manual - Manual (Page 36)

WaveRunner Xi-A and MXi-A Oscilloscopes
28 922138-00 Rev A
Turning On Traces
Turn on a channel trace by pushing a front panel
channel select button (displaying the trace label for
the corresponding input channel). While this turns
on the trace, it leaves the current dialog displayed.
If you want to also display the vertical setup dialog
for the channel trace, touch the trace label twice.
The first touch activates the channel, while the
second opens its setup dialog. The appearance of
the selected trace label becomes a solid color when
active:
Turn on a math function trace by touching Math 
Math Setup... on the drop-down menu. Touch the
On checkbox for the trace you want to activate.
You can also turn on traces for math functions,
parameters, and memory traces without leaving the
Vertical Adjust dialog by touching the icons at the
bottom of the Vertical Adjust dialog.