To draw a parabola

1. Click the Simple Line Tool in the toolbox.

2. Click the Parabola button in the ribbon.

3. Point where you want to begin the parabola.

4. Drag where you want to place the other end of the parabola. Release the mouse button.

5. Move the pointer to where you want the highest point of the curve.

6. Click the mouse button to finish drawing the parabola.

If you do not see the toolbox or the ribbon, click Toolbars on the View menu, and then click the Toolbox and Ribbon items. To constrain the line in steps 3 and 4 to a 15-degree angle, select the Angle Constraint button. To draw the line in steps 3 and 4 from the center outward, press and hold CTRL while drawing, or click the From Center button .