This is the Line Segment tab of the Markers page of the Graph Options dialog box. The settings in this tab affect the appearance of Line Segment markers in your graph.
Line style: This entry controls whether the drawn line is solid or dashed.
Line weight: This entry controls width of the drawn line.
Symbol: This entry controls the symbol used to represent the endpoints of the line segment marker.
Symbol size: This entry controls the size of the symbol representing the marker endpoints. The larger the specified number, the larger the symbol.
Color: Click on the Edit button to change the color of the line segment marker.