DIAMOND facilitates handling of parameterised drawings, where geometry, and its properties, are specified by parameters instead of fixed dimensions. Those can be constants, measurements from existing geometry, or equations including references to other parameters. Again, changing parameters will automatically modify any associated geometry, as well as the magnitudes of other parameters based on the modified geometry. Parameterised drawings are ideal for production of any number of variations of the same intrinsic design, without the need to repeat the design or modify a previous one. The same is true with regard to parameterised symbol parts or blocks. DIAMOND's steel library contains only fifteen parts - all of them parameterised. This surprisingly tiny library is sufficient to generate symbols required for the display of 'section', 'shaded' (hatched), 'outline', 'plan', 'elevation' and 'flange' views of all permissible standard sizes of universal beams, columns, channels, rolled steel joists, circular, square and triangular hollow sections, equal and unequal angle beams, castellated universal beams and columns, and castellated steel joists.

In fact, DIAMOND offers even more. Following modification of existing geometry or its parameters, while redefining effected entities in light of the new circumstances, it carefully checks the validity of the modified geometry. If it finds that the redefinition of a redefined entity renders it impossible, it immediately returns all items modified so far to their previous stage, thus reducing the chance of design errors. Design principles and methods can be applied to any required design, regardless of complexity. Their power and benefits become more significant as effected operations become more elaborate. They allow users to manipulate not only basic items according to predefined rules, but also newly constructed assemblies behaving according to rules set by the system operator.