The Legend Properties dialog box allows you to change how your legend appears on your chart. You can change the legend border, choose a legend color, and make the background transparent. You can also change the display of the data series from this dialog box.
Display Legend
Enable to display a legend beside your chart.
Display Border
Enable to display a border around the chart legend.
Legend Border: Thickness
Specifies the thickness of the border around the chart legend.
Legend Border: Color
Displays a color palette, where you can choose a color for the border around the legend.
Legend Fill: Color
Displays a color palette, where you can choose a fill color for the legend background.
Transparent Background
Enable to make the background of the legend transparent.
Reverse Series Order
Enable to reverse the order of the data in your chart. If Series A in your spreadsheet data is 2, 4, 6, 8, it will appear on your chart as 8, 6, 4, 2.