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Page 4: Mini-Poster
The easiest way to add interesting contrast is with typefaces. But don't forget about rules (drawn lines), colors, spacing between elements, textures, etc.
If you use a hairline rule between columns, use a strong 2- or 4-point rule when you need another - don't use a half-point rule and a one-point rule on the same page. If you use a second color for accent, make sure the colors contrast - dark brown or dark blue doesn't contrast effectively with black text.

There is a bit of contrast between the typefaces and between the rules, but the contrast is wimpy - are the rules supposed to be two different thicknesses? Or is it a mistake?

Now the strong contrast between the typefaces makes the piece much more dynamic and eye-catching.
With a stronger contrast between the thicknesses of the rules, there is no risk of someone thinking it's a mistake.

This is simply another option using rules (this thick rule is behind the white type).
With contrast, the entire table is stronger and more sophisticated; you know where it begins and where it ends.
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Source: The Non-Designer's Design Book by Robin Williams
