selector { letter-spacing: 2px; }

The distance between characters is governed by the letter-spacing attribute, with values expressed in pixels. Letter Spacing is used in Thesis in the Navigation Menu, Byline, Widget H3 title, and other areas.

Default letter-spacing is typically 2px, but can be changed from 0-5 pixels here. Note that letter-spacing can be a negative number, but you humans would make a hash of that, and we're not giving you that here. Edit the CSS output generated if you must.