If you have several curves in the plot and want to display only one curve temporarily, this Solo Curve setting can be used. If it is turned on, it hides all curves that do not belong to the active measurement.
If there are several curves of the same active measurement, only the last plotted curve will be visible as shown in the legend list below.
The other curves are not deleted from the plot, but are set as invisible. They may easily be set visible again by turning Solo Curve off. If Solo Curve is turned off, the curves that were visible before Solo Curve was turned on are set visible again.
Note that if Plot->Refresh... is selected with the setting shown below
or if Plot->Auto-Refresh... is set as shown below
all the curves that are refreshed are set visible when Solo Curve is turned off. This is because when refreshing all curves, it is likely that the user wants to display all the refreshed curves.