This command fits a curve between two tangent lines by entering a known radius. It prompts for the radius and then prompts to pick points on the two tangent lines.
Radius of Arc
<300.000>: press Enter
[nea] Pick Point on 1st Tangent
Line:pick a point
[nea] Pick Point on 2nd Tangent
Line: pick a point
Pulldown Menu Location: Draw > Arc
Keyboard Command: 2tanlin
Prerequisite: Tangent lines should be drawn before
execution