About the Data Series Tab
Use the Data Series tab on the Graph Window Options dialog box to change the appearance of data series. Use the following fields to graph multiple data series with shared x and y axes in a single window:
• Graph—Select a graph or subgraph whose data series you want to customize.
• Data Series—Use the input field to edit the label for the selected data series. To change the color of the graph's points and lines, click the color selection buttons. You can also modify the points' style and interpolation and the lines' thickness.
• Legend—Use this area to toggle the legend. If you want to change the style, color, and size of the font, click the Text Style button.