Rigol DS6000 Series User Manual page 166

RIGOL
― In X-Y cursor mode, the Y cursors are used to measure the amplitude of the
waveform of CH2 or CH4.
Press the front panel function menu CURS  Mode, use
cursor mode (the default is Off) and then press the knob. The modes available
include Manual, Track, Auto and X-Y. When "Off" is selected, the cursor measurement
function will be turned off.
Note: You can only select X-Y cursor mode when the time base mode is set to "X-Y"
(please refer to "Time Base Mode"); in addition, in "X-Y" time base mode, you can
only use X-Y cursor mode.
6-30
6 To Make Measurements
to select the desired
CURS
DS6000 User's Guide