Principles of Two-Dimensional Design
Interrelationships of Form

Each composition begins with a super-unit that clearly demonstrates one assigned relationship:
- Union: Two or more forms merge and become one larger form. The internal boundaries between the original forms disappear.
- Subtraction: One form removes a visible area from another, creating a new contour and an active negative space.
- Intersection: Only the area shared by the overlapping forms remains visible.
- Coinciding: Two forms occupy exactly the same position and overlap completely, appearing as a single form.
Super-unit versus composition

A super-unit is a small structure created by combining two or more shapes through an Interrelationship of Form.
The final composition must develop that starting structure into a larger visual system:
- Create one clearly resolved super-unit.
- Repeat the super-unit at least eight times.
- Alter the repeated instances in a controlled way.
- Organize the instances through the assigned repetition grid, grid structures, and principles.
- Use the complete square format, including its edges, margins, and negative spaces.
The assigned relationship inside the original super-unit must remain identifiable after the instances are repeated and altered.
Other Principles
Radiation
Radiation organizes repeated forms around a common centre. Changes in direction, scale, spacing, or rotation can create movement, emphasis, and a strong focal point.
Anomaly
An anomaly is an intentional irregularity within an otherwise consistent system. A change in shape, size, position, direction, value, or texture can interrupt the pattern and create emphasis.
Concentration
Concentration organizes forms through changes in density and distribution. Elements may gather around a point, line, area, or direction, creating dense and sparse regions within the composition.
Texture
Texture describes the visual or physical qualities of a surface. Changes in marks, grain, density, pattern, material, and value can make a form appear smooth, rough, soft, irregular, flat, or dimensional.
Contrast
Contrast creates a clear difference between visual elements. It may be developed through size, shape, value, direction, position, density, texture, or positive and negative space.
Space
Space is created through the relationships between forms and the surrounding field. Scale, position, overlap, cropping, direction, and positive–negative relationships can produce flat, illusory, or fluctuating spatial effects.
Source: Wong, W. (1972). Principles of Two-Dimensional Design. Van Nostrand Reinhold Company.
Form and Space
The activity also applies three approaches from Timothy Samara’s chapter “Seeing Form and Space.”
Surface Activity
Surface activity changes how a plane is perceived through marks, patterns, texture, density, scale, direction, and material variation. These qualities can affect visual weight, movement, depth, and the relationship between a form and its surrounding space.
Breaking Space
Breaking space treats the format as an active boundary. Forms may touch, divide, cross, interrupt, or move beyond its edges, changing how the viewer perceives tension, movement, continuity, and the limits of the composition.
Arranging Form
Arranging form establishes relationships between multiple elements. Alignment, grouping, clustering, separation, overlap, scale, and placement can create hierarchy, rhythm, direction, emphasis, and visual order.
Source: Samara, T. (2007). “Seeing Form and Space.” In Design Elements: A Graphic Style Manual (pp. 58–65). Rockport Publishers.


