I had a terrible idea for a T-shirt and now it’s available.

The terms tracking and kerning are often interchanged by accident. Tracking generally refers to the overall spacing of a range of range. You select a range and apply tracking to spread out the spacing between letters and words or to tighten it up.

Kerning, a term from metal type days, refers to the fit between two adjacent characters. You kern in pairs, and you can kern a pair a letters and track the range of text they fall in as separate parameters. (A kern was originally an overhang extending beyond the body of a metal letter that would rest on the shoulder of the next letter or a “high” word space design to keep it from breaking off.)

Would some call me pedantic for explicating the difference? Absolutely. Enjoy!