When designing for a series or campaign, corresponding graphic elements and compositions will help people recognize and identify that the collateral and/or media belong together. Among the materials, there should be similarities--for example, in the kind of imagery (illustrations versus photographs); style; common composition/layout; type treatment; color palette; and type-image relationships.
a) Similarities in imagery
b) Differences in style
c) Varied composition/layout
d) Diverse color palette