You can create, modify and add content to a leader object.
A leader object is a line or a spline with an arrowhead at one end and a multiline text object or block at the other.
A leader object typically consists of an arrowhead, an optional horizontal landing, a leader line or curve, and either a multiline text object or block.
The appearance of a leader is controlled by its multileader style. You can use the default multileader style, STANDARD, or create your own multileader styles.
Leaders can contain multiline text or blocks to label parts of your drawing.