Click Ellipse
on the Sketch toolbar, or Tools,
Sketch Entities, Ellipse.
Use the Ellipse tool to create a complete ellipse. Use the Partial Ellipse tool to create an elliptical arc.
To create an ellipse:
Click Ellipse
on the Sketch toolbar, or Tools,
Sketch Entities, Ellipse.
The pointer
changes to 
.
Click in the graphics area to place the center of the ellipse.
Drag and click to set the major axis of the ellipse.
Drag and click again to set the minor axis of the ellipse.
To change the properties of an ellipse:
In an open sketch, select the ellipse and edit the properties in the Ellipse PropertyManager.