Structural Reinforcement
Each area of panel enrichment should have one or more accented points known as points of concentration. The design should become more prominent at these places and cause the eye to rest for a moment before passing to the next point of prominence. The accented portion of the design at these points should be so related to the structure that it apparently reinforces the structure as a whole. Corners, centers of edges, and geometric centers are salient parts of a structure; we shall therefore be likely to find our points of concentration coinciding with them. Let us then consider the first of these arrangements as applied to enclosed enrichment.
Marginal Panel Enrichment
Enclosed Enrichment for Partly Enriched Surfaces
Rule 7a. Marginal panel enrichment should parallel or be related to the outlines of the primary mass and to the panel it is to enrich.
Rule 7b. Marginal points of concentration in panels should be placed (1) preferably at the corner or (2) in the center of each margin.
Rule 7c. To insure unity of design in panels, the elements composing the points of concentration and the links connecting them must be related to the panel contour and to each other.
Marginal Zone Enrichment
The marginal method of enrichment may be used when it is impossible to enrich the entire surface because the center is to be used for utilitarian purposes or because it would be aesthetically unwise to enrich the entire surface. The marginal zone is adapted to enriching box tops, stands, table tops, and similar surfaces designed preferably with the thought of being seen from above. We shall call such surfaces horizontal planes.
Points of Concentration
Points of Concentration in the Corner of Margin