RIGOL DS6000 Series - Manual (Page 208)

RIGOL 11 Display Control
DS6000 User’s Guide 11-4
3. Infinite
In this mode, the oscilloscope displays the waveform newly acquired without
clearing the waveforms acquired formerly. The waveforms acquired formerly will
be displayed in relatively low-brightness color and the waveform newly acquired
will be displayed in normal brightness and color. Infinite persistence can be used
to measure noise and jitter and to capture incidental events.