The designer uses an understanding of the formal elements and the other principles of design to establish a common bond among the elements of a design. There are a number of devices you can use to achieve unity.

Correspondence: When you repeat an element like color, direction, value, shape, or texture, or establish a style, like a linear style, you establish a visual connection or correspondence among the elements.

Continuity: Related to correspondence, continuity is the handling of design elements, like line, shape, texture, and color to create similarities of form.

Variety: Although an opposite of continuity, the two can be combined to add interest.

Grid: Subdividing the format into fixed horizontal and vertical divisions, columns, margins and spaces establishes a framework for organizing space, type and pictures in a design.

Alignment: Visual connections can be made between and among elements when their edges or axes line up with one another. The eye detects these relationships and makes connections among the forms.

Flow: Elements should be arranged so that the audience is led from one element to another. Flow is also called MOVEMENT and is connected to the principle of rhythm as the sense of movement from one element to another.