Click this icon to insert an arc between two locations. Select two locations and an arc will be drawn between them. The default arc is a semicircle. Generally nothing is entered into the modifier since the two locations are already determined on your drawing.
To use this tool:
1. Turn off your constraints.
2. Click on the first location where you wish to start the arc.
3. Click on the second location where you wish to end the arc. If no radius has been entered, a semi‐circle will be drawn.
As with all the arc tools, the radius will be drawn in a counter‐clockwise direction. In some cases, you may need to start with your second location first