To create a torus, in the Geometry toolbar, from the More Primitives () menu, select Torus (). You can also right-click the Geometry node to add a Torus.

From the Type list, select Solid or Surface to specify if the torus is a solid object or a (hollow) surface object.

Define the size and shape of the torus in the Major radius, Minor radius, Revolution angle and Interior faces fields. The Major radius (default: 1) field controls the distance from the center of the cross section to the center of the torus. The Minor radius (default: 0.5) field controls the radius of the cross section. To get less than a full revolution (360 degrees, the default), use the Revolution angle field. Select the Interior faces check box to create cross-sectional faces that partition the domain of a Solid torus.

Enter the position of the torus’ center using the x, y, and z fields.

Specify the direction of the third axis of the torus’ local coordinate system — that is, the normal to the plane of directrix circle. From the Axis type list, choose x-axis, y-axis, or z-axis (the default) to obtain an axis aligned with the specified coordinate axis. Choose Cartesian to enter a direction vector using the x, y, and z fields. Choose Spherical to enter the direction using the angles theta (polar, zenith) and phi (azimuth).

Specify the rotational angle about the axis in the Rotation field. When this angle is zero, the second axis of the torus’ local coordinate system is parallel to the xy-plane.

The coordinate system in which the position, axis, and rotation angles above are interpreted. From the Work plane list, select xy-plane (the default, for a standard global Cartesian coordinate system) or select any work plane defined above this node in the geometry sequence. If you choose a work plane, the work plane and its coordinate system appear in the Graphics window, using an extra coordinate triad with the directions xw, yw, and zw (which are then used to specify the position of the torus).

Select the Resulting objects selection check box to create predefined selections (for all levels — objects, domains, boundaries, edges, and points — that are applicable) in subsequent nodes in the geometry sequence. To also make all or one of the types of resulting entities (domains, boundaries, edges, and points) that the torus consists of available as selections in all applicable selection lists (in physics and materials settings, for example), choose an option from the Show in physics (Show in instances if in a geometry part) list: All levels, Domain selection, Boundary selection, Edge selection, or Point selection. The default is Domain selection, which is suitable for use with materials and physics defined in domains. For use with a boundary condition, for example, choose Boundary selection. These selections do not appear as separate selection nodes in the model tree. Select Off to not make any selection available outside of the geometry sequence. From the Color list, choose a color for highlighting the resulting objects selection. See Selection Colors.

If you want to make the resulting entities contribute to a cumulative selection, select a cumulative selection from the Contribute to list (the default, None, gives no contribution), or click the New button to create a new cumulative selection (see Cumulative Selections).