Using the Oscilloscope 2
Keysight Infiniium 9000 Series Oscilloscopes User’s Guide 39
You can also mouse over the Trigger Level field and use the resulting controls to
set a particular trigger level when the scope is set for edge trigger on a particular
channel. You can also drag the trigger reference indicator at the left side of the
display, or drag the trigger line itself, which appears when you click or touch the
grid.