Category Overlay Fit Lines

To display the Category Overlay Fit Lines dialog, click the Multiple patterns button in the Fitting dialog (accessible by double-clicking on a fit line in a graph) or in the Plot: Fitting options pane of the Graph Options dialog [accessible by clicking Graph Options on the Format tab (ribbon bar) or by selecting Graph Options from the Format menu (classic menus)].

Pattern. Click any of the Pattern buttons to display the  Line Properties dialog, 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.