Letter spacing is a typographic term referring to the relative space between individual letters.

The spaces between each letter in a word. Light Reflectance Value A relative term used to describe how well a surface reflects light. Contrast is calculated in percent between foreground and background, e.g. light color on dark background. The standard for readability is a contrast of at least 70%. The readability is determined by the formula: Contrast=[(B1-B2)/B1] x 100 where B1= light reflectance value (LRV) of the lighter area and B2= light reflectance value of the darker area.

See "spacing".

See kerning.

The amount of air between characters in a word.

The amount of space between letters.

The amount of space that separates letters in a word.

Adjusting the average distance between letters in a block of text to fit more or less text into the given space or to improve legibility. Kerning allows adjustments between individual letters, letter spacing is applied to a block of text as a whole. Letter-spacing is sometimes referred to as tracking or track kerning.

Extra space inserted between letters in a word. Also called kerning. Best used to modify headings, this should be applied with caution, since too much letter spacing makes copy difficult to read. Some programs automatically add letter spacing when the text is justified. ( See tracking)

Amount of space between letters, adjustable using computer or typesetting software.

The placing of additional space between each letter of a word.

The space between letters in a word.

The addition of space between the letters of words to increase the line-length to a required width or to improve the appearance of a line.