Map Legend / Key
Legends, also called map a “key,” define the meaning of symbols and style used on a map. The choice to include a legend depends on your map’s purpose and your audience. Maps do not need legends if the symbology is so common or simple as to be easily understood by the reader. However, it must be clear what the symbols represent.
Legends are created by laying out symbols, styles and text. To create a legend, use guidelines to keep your layout tidy.
Adding Legends from the Symbols Palette
A variety of legend layouts are available in the Symbols palette. Use the Symbol Stamp tool to add a pre-defined legend, ungroup it, and edit the symbols and text as appropriate.