Changes to the original manuscript copy made by the author or designer that affect the content, final form or both. Distinguished from any corrections or changes resulting from errors made by the designer or the typographer.

An old measurement size of approximately 5½ points. In newspaper advertising fourteen agate lines made one inch of matter. Agate Lines were a unit of measurement for newspaper advertising space.

1. Any break in the text that violates an established typographic rule. 2. An undesirable situation at the end of typeset lines, such as improper hyphenation or an unwanted word division.

Any manuscript that is indistinct, illegible, poorly specified, improperly edited, or otherwise considered unsatisfactory.

A horizontal, imaginary line on which the Latin typeset characters ‘sit’ or ‘rest’. Leading, or line spacing, is measured from baseline to baseline.

The height of a capital letter measured from the baseline to the top of the letter. This may or may not be the same as the height of ascenders. Not to be confused with x-height.