
Default UI Menu: Draw/3D Object/3D Primitives/Sphere
Ribbon UI Menu:

Creates a sphere centered on the current workplane.
- Select the center point of the sphere. The point will be projected onto the current workplane.

- Click to size the sphere, or enter the radius in the Inspector Bar.

The sphere is created, centered on the workplane.

Sphere Properties
The Properties window of a sphere (and hemisphere) contains a Sphere page, in which you can set the radius.
