Wm. J. Townsend submitted a routine to draw curved leaders. Load the LISP file, and then enter Curvel at the command line. You will be prompted to select the first point (which is the leader endpoint), then a second point to locate the annotation. A ninety-degree curved leader will be drawn, and your annotation converted to upper case and placed at the correct location. The arrowhead size and radius are based on the current value of Dimtxt, and both the leader and annotation are constructed on a layer named CURVED_LEADER.