Category Overlay Fit Lines

In the Fitting dialog box (accessible by double-clicking on a fit line in a graph) or on the Plot: Fitting tab of the Graph Options dialog box, click the Multiple patterns button to display the Category Overlay Fit Lines dialog box.

Pattern

Click any of the Pattern buttons to display the  Line Properties dialog box, in which you can change the width, color, pattern, and style of lines on the graph.

Close

Click Close to accept your changes and return to the previous dialog box.