- Draw 2-Point Arc entities.
- Click to set start point of arc.
- Move cursor.
- Click at ending point of arc or enter value.
- Move cursor perpendicular to line to set bulge distance or enter value.
- Click to finish arc.
- Esc = Cancel operation.
- Ctrl '+' or Ctrl '-' = Change the number of segments
- Shift = Lock tool to current inference direction
- Arrow keys = Lock drawing direction to specific inference direction (Up=Blue, Left=Green, Right=Red, Down=Parallel/Perpendicular)