Keysight Technologies U2701A Guide D'utilisation page 52

2 Scope Features and Functions
Figure 2-7
52
Figure 2-7 shows the sample marker (horizontal line in orange color)
automatically marks the maximum value of the waveform displayed when
Maximum measurement type is selected.
Auto marker automatically marks the maximum value of the
waveform when Maximum measurement is selected
Keysight U2701A/U2702A User's Guide