The arc tool is used to draw open arcs. Press the mouse button and drag the mouse while continuing to hold down the button. When you have created the desired arc, release the mouse button.
The direction you drag the mouse determines the circular quadrant from which is will draw the arc. To draw an arc from the left hand side of the oval, you must drag the cursor to the left, and vice versa to draw an arc from the right side. To draw an arc from the top of the oval, you must start at the top and drag down. To draw an arc from the bottom of the oval, you must start at the bottom and drag up.
