Baseline Shift

Baseline Shift - A formatting option that moves selected characters above or below the baseline of normal text.


Reference
Bagley, Dean (2005). Essentials for Design: Illustrator CS Level 1. Upper Saddle River, NJ: Prentice Hall

Baseline

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Baseline - The implied reference line on which the bases of the capital letter sit.

• In typography and penmanship, the baseline is the line upon which most letters "sit" and below which descenders extend.

Reference
Bagley, Dean (2005). Essentials for Design: Illustrator CS Level 1. Upper Saddle River, NJ: Prentice Hall

Wikipedia: Baseline (typography)