1. Open the Curve flyout and click the Freehand tool
2. Click where you want the line to begin.
3. Click where you want the line to end. Hold down CTRL as you place the end of the line to constrain the angle of the line to 15-degree increments.
How to
To draw a curve or a straight line connected to another
Related topics
Drawing lines and curves with the Freehand and the Bezier tool