Use the Legend Panel to select options for the legend of a graph. The legend area provides a key to the information that is shown in the graph. It contains legend markers, each corresponding to a series of data, and legend text, which describes the data in that series.
For example, you might have different cities represented by data markers of different colors. Markers represent data on a graph. If red markers in your graph represent New York, then there is a corresponding red legend marker in the legend area, with legend text reading "New York."
Show legend box -- Specifies whether to show the legend.
Location box-- Specifies the position of the legend in relation to the plot area, such as Top, Bottom, Right, and Left. Select Automatic to let the graph determine the best location for the legend.
Background color box -- Specifies a color for the background of the legend area.
Border color box -- Specifies a color for the border of the legend area.
Legend Font button -- Displays the Font dialog box, which specifies font attributes for the legend text.