Line Format Section
Contains cells that control line attributes for a shape, such as pattern, weight, and color. They determine whether the line ends are formatted (for example, with an arrowhead), the size of line end formats, radius of the rounding circle applied to the line, and line cap style (round or square).
Remarks
You can set line formats by using the Line dialog box (on the Home tab, in the Shape group, click Line, point to Weight, and click More Lines), by applying a line style, or by entering a formula in a Line Format cell.