You can draw an oval in the following way:
1. Click the Oval tool on the left toolbar.
2. Change the size of the element, stroke size, and color.
Element Size
You can change the size of the oval in any of the following ways:
Drag the corners of the element.
Adjust the size from the properties toolbar.
Stroke thickness:
If you wish to change the stroke thickness, enter the required size in the Stroke Size field on the properties toolbar.
3. When you’re done, save your page or continue editing.
Learn more about changing the fill color of your shape.
Get more info about changing the stroke color of the shape.