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Oval: To draw an oval, use the Oval (four edges) tool. Indicate the center of the two circular end caps,
and then indicate their radius.
Circle: To draw a circle, use the Circle tool. Indicate the center and then the radius.

Arc by Tangent: To draw an arc by tangent, use the Arc by Tangent tool. Select an edge or endpoint to
start a tangent arc. An arc is then rubber banded. You control the radius and angular extent of the arc
with the cursor. Which way the arc curves from your initial selection depends on your cursor position.
If you imagine a tangent line extending out from this first location, which side of that line your cursor is
on effects the direction the arc curves.

Ellipse: To draw an ellipse from a center point, use the Ellipse tool. Indicate the center and then the end
of one axis of the ellipse to determine the angle of the ellipse. Use the third indication to determine the
length of the other axis of the ellipse.

Spline: To draw a closed or open spline, use the Spline tool. Create the spline by indicating a series of
locations and then use the right mouse button to finish the spline either Open End or Closed End, with
Fit Points or Control Points, both or without Points. The with Points options will create points at the
locations associated with the spline, like the center points of circles.

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