These drawing modes can be selected in the Drawing Mode submenu in the Display menu, or in the Dialog Bar - Left.
This mode is actually very flexible, and supports representations ranging from very schematic line drawings to fully three-dimensional. The settings in the Rims, Linewidths, and Shading commands in the Input2 menu have an especially great influence on this mode.
The alternatives to 2D modes are 3D Drawing modes, which give a more realistic appearance in full color, but are not generally suitable for schematic drawings, as there are no rims or boundary lines. See Description of the Calculations for details on the difference between 2D and 3D Drawing modes.
Stereopairs. Selecting 2D Stereopair causes two separate drawings to be made, which are identical except for the Stereopair Rotation Angle. Many people cannot view a stereopair directly because of the difficulty of getting the left and right eyes to focus on separate points at a short distance. However, various devices are available for such viewing, using lenses, mirrors or prisms.
Some people can view stereopairs by crossing their eyes, without artificial aids. For this, the Stereopair Rotation Angle should be negative.
Stereo viewing works best when Perspective is selected.