Teledyne LeCroy LabMaster 9Zi-A - Manual (Page 90)

LabMaster 9 Zi-A
82 922157-00 Rev A
The default setting (Time) is for delay readout (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 → Preference
Setup... and select the Acquisition dialog to make the setting.

Post-trigger Delay - This is indicated by a left-pointing arrow to the
lower-left of the grid. Pre-trigger delay is indicated by a right-
pointing arrow to the lower-right of the grid.

Trigger Level - This indicator is located at the right edge of the grid.
It tracks the trigger level as you reposition the trace up or down, or
change scale. When triggering is stopped, a hollow arrow indicates
where the new level ends up when triggering resumes.
Push the LEVEL knob to reset the level to 50%.

Zero Volts Level - This indicator is located at the left edge of the
grid. Change the zero volts level by turning the vertical OFFSET
knob.
Push the knob to reset the indicator to the middle of the grid.