To add
an oval (or a circle) to a graph:
-
Click
the oval icon

in the Graph toolbar, or select
Insert
Oval from the menu.
-
Place
your cursor at the top left position in the graph where you want your
oval to begin.
-
Click
and drag the image to the right to create an oval.
If you
press the CTRL key and then click and drag, the oval expands from
the center.
If you
press the SHIFT key and then click and drag, you can draw a perfect
circle.
If you
press SHIFT + CTRL and then click and drag, you draw a circle that
expands from the center.