Other forms: typesetting
To typeset is to arrange pieces of type, each one representing a letter or symbol, in preparation for printing.
Before mechanical printing was developed (and after that, computer-based printing), almost all printed materials had to be typeset by hand. Typesetters would arrange each individual piece of type, composing an entire page before inking and printing on paper. Today, items that are printed by hand (like letterpress cards and books) still have to be typeset, but in most of the printing world, this kind of work is obsolete.