\LegendDefinition[LabelOrientation=c]{
	\LegLine{style=StdLineStyA} & IdentI\\
	\LegLine{style=StdLineStyB, linewidth=3pt} & second legend\\
	\LegLine{style=StdLineStyC} & whatever this data is\ldots\\
	\LegLine{style=StdLineStyD} & and more data\\
	\LegDot{style=StdLineStyC, plotstyle=dots} & plotstyle=dots
}