To Create a Leader Note (AutoCAD Mechanical Toolset)

Click Annotate tab > Symbol panel > Leader Note. Find
Select an object to attach the leader note to.
If you attached the symbol to a line, in the drawing area, specify the start point for the leader.
If you attached the object to an arc, circle, ellipse or spline, skip to the next step.
Specify one or more points to define the vertices of the leader, and then press ENTER. The Leader Note contextual ribbon tab displays.
In the note text editor, change the note text, if necessary.
Click Leader Note tab > Close Editor panel > Close. Find