1.3.6-23 Restricted Use of Three-Dimensional Scaling

Unless required, use of three-dimensional scales (i.e., where a Z-axis is added to the display) should be avoided.

Additional Information:
Showing a Z-axis on a VDU display that is limited to two actual dimensions will confuse many users. If three-dimensional scaling is employed, a consistent method of representation (e.g., isometric or orthographic projection, perspective drawing, or triangular coordinate grid) should be used. It is often possible in graphic display to show a third dimension through use of auxiliary coding (e.g., color or shape coding, or supplementary annotation), which may prove more effective than trying to represent a third spatial dimension pictorially.