Final answer:
Pair serif and sans-serif typefaces by considering their visual harmony and contrast, complementing weight and proportion, and using serif fonts for headings and sans-serif for body text.
Step-by-step explanation:
When pairing serifed and unserifed typefaces, also known as serif and sans-serif, it's important to consider their visual harmony and contrast. Serif fonts, characterized by the little "tails" or strokes at the end of their letters, tend to evoke a classical or refined feeling, while sans-serif fonts, which lack these embellishments, are often seen as more modern. To successfully pair these two, ensure that the fonts chosen complement each other in weight, proportion, and x-height, and consider using the serif font for headings or emphasis to take advantage of its decorative qualities, and the sans-serif for body text to benefit from its clear, legible appearance.