You can use the Hemisphere Tool to create Hemisphere. When the Hemisphere Tool is clicked, a "Primitives" window will appear in the same space as the Group List window. Use the X, Y and Z entrants to modify the hemisphere's position. Use the radius entrant to modify the radius of the hemisphere. Any changes made in the Primitives window will be previewed in the 3D Viewing Window by a transparent gray hemisphere.
You can also use the controls on the previewed hemisphere in the 3D Viewing Window to edit the hemisphere. Press add when you are finished editing the hemisphere to add it to your existing geometry.
