Category Overlay Lines

Select the Multiple lines check box and click the Multiple lines button in the Plot: General 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)] or in the General dialog (accessible by right-clicking on any line in a graph and selecting General Plot Options from the shortcut menu) to display the Category Overlay Lines dialog.

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.