Unity is an essential sensibility for any designer. Unity helps to create order. Typical modes of unity include: proximity; grouping; alignment; repetition; alignment; closure, containment; overlapping and grids.
From the upper left, ■ lips in close proximity (barely touching in fact) align with flush left type; ■ a boxer is contained and overlapped; ■ portions of numerals are absent yet closure permits their understanding while proximity and overlapping permit bonding; ■ four letterforms are unified by proximity and by the same kind of lines (type) repeating; ■ a grid controls type placement through employing a series of regular intervals; ■ a line of trees repeat their forms thus unifying the group. On the bottom left, ■ the color black and the color white overlap the red bands of color; ■ colors and shapes and repeat and vary; the figures repeat (and vary) while the horizontal lines repeat vertically; ■ lastly, a comprehensive diagram depicting nine modes of unity.
Exercise: Retrieve an old design, photo or artwork you’ve long forgotten about. Copy it for comparison’s sake. Modify at least one thing in that image to employ greater unity using any of the means of creating unity listed above. Now make a second version whereby you employ at least three of the means of creating unity listed above. Compare both to the original.