Owon SDS series User Manual page 51

5.Advanced User Guidebook
Display Type: With the F1 menu selection button pushed down, you can shift
between Vect and Dots types. The differences between the two display types can be
observed through the comparison between Figure 5-32 and Figure 5-33.
Figure 5-32 Display in the Vector Form
Figure 5-33 Display in Dots form
Persist
When the Persist function is used, the persistence display effect of the picture tube
oscilloscope can be simulated. The reserved original data is displayed in fade color
and the new data is in bright color. Press the H2 button, the Persist menu will display
at the right of screen. Press the F1 button, different persistence time can be chosen:
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