This command fits a curve between beginning and end points (PC,
PT) given a tangent-in. The tangent-in is specified by selecting a
line entity. The PC and PT points are screen picked.
Pick tangent-in:
pick a line entity
Pick point PC: pick a point
Pick point PT: pick a point
Pulldown Menu Location: Draw > Arc
Keyboard Command: tangpcpt
Prerequisite: Tangent line