Go to Draw > Wire Grid > Sphere in the main menu to display the Draw dialog box for the Sphere. There are three pages: Sphere, Attributes and Materials.
The Sphere page
In the Sphere page the geometrical parameters for the Sphere can be set, Fig. 1. There is a combo-box with two options: Curved segments and Straight segments. Choose Curved segments for an exact representation of the sphere curvature. The Straight segments option is an approximation using linear wires.
The Sphere is defined by giving the Center coordinates, Radius and orientation angles, Theta and Phi. A sphere is a surface which is defined uniquely by these parameters, as shown in Fig. 2.
Once the geometrical parameters in the Sphere page have been set, the Attributes page can be chosen, where the number of facets of the Sphere can be entered. Refer to Wire Grid Attributes > to see other parameters that can be set in the Attributes page. Refer to Wire Materials > to see the parameters that can be set in the Materials page.