This article offers information on the different types of legends that are automatically created within graphs.
Issue/Introduction
Types of Legends Automatically Created in Graphs
Resolution
In addition to the standard legend (which identifies patterns and colors used to mark individual plots in the graph), there are also other more specialized types of fixed legends.
Contour legends identify the levels in surface or contour plots.
Icon legends identify the assignment of icon features to specific variables.
Selection legends identify the case selection conditions used to classify cases into multiple subsets shown on the graph.