Teledyne LeCroy WaveRunner МXi-A Getting Started Manual - Manual (Page 28)

WaveRunner Xi-A and MXi-A Oscilloscopes
20 922138-00 Rev A
At the right-hand end of the top menu bar is an Undo button.
This button appears after the AutoSetup front panel button is pressed, and
after Zooming. If you want to perform an Undo operation, it must be the very
next operation after you perform the Autosetup or Zoom operation.
Grid Area
The grid area is divided into 8 vertical divisions and 10 horizontal divisions just
like any other oscilloscope. There are several indicators on the grid to help you
understand the following:

Trigger Delay - This indicator is located along
the bottom edge of the grid. Trigger delay
allows you to see the signal prior to the trigger
time.
All trigger delay values (including post-trigger
delay, shown here) are displayed in the
Timebase Descriptor Label. Zero delay is the
horizontal center of the oscilloscope display.
The default setting (Time) is for the delay to be
read out in seconds, and to move
proportionately when the timebase knob is
turned. If you want to set delay (Div) to a fixed
position on the grid and then have it stay fixed
as the timebase changes, go to Utilities,
Preferences, Acquisition.