Sets the default for whether analog tags are plotted on the graph on the Historical Data Viewer page. If set to 1 (default), then analog plots will be visible on the graph after being added to the legend.
If set to 0, then analog plots will not be visible on the graph after being added to the legend.
Properties for individual pens may be set using the Pen Properties dialog, available in the legend.
Section: System
Default: HDVAnalogPenVisibility = 1
*No restart required (Settings.Dynamic property)
