The Build Primitives dialog enables generation of Cone, Cube, Cylinder, Disk, Polygon, Rectangle, GEO Sphere, Latitude Sphere, Tube and Torus primitives by specified dimensions.
Choose the desired primitive, type in the dimensions, and press the Make button. The Build Primitives dialog is modeless so it can be left up if a number of primitives are to be inserted.
You can also interactively generate a primitive by choosing the desired Primitive's tab page and dragging out a bounding box in any of the Working-Volume TOP, FRONT, or SIDE views. The specified primitive will fill the space of the bounding box. Note that the Auto checkbox must be checked to interactively draw primitives.