distribute
To separate (type which has been used) and return it to the proper boxes in the cases.
distribute: sorting used type back to storage
In letterpress printing, distribution is the work of taking apart lines of metal type that have finished their job and sorting each character back into its correct compartment in the type case. After a job is printed, the forme (the assembled page of type locked in a chase) must be broken down. The compositor separates the type pieces and returns them to the shallow wooden cases where lowercase and uppercase letters, figures, and punctuation live in their designated boxes, or sorts. This is the opposite of composition, where type is pulled from the case and assembled into lines and pages.
The process demands speed and accuracy. A compositor distributing type sorts by eye and hand, dropping pieces into the correct sort at a steady rhythm. Mistakes here create real problems downstream: a misplaced a or e means the compositor will grab the wrong character during the next job, producing typos or requiring reprinting. Many print shops employed distribution as specialist work, either assigning it to junior staff learning the trade or bringing in workers specifically for breaking down formes at the end of a job.
The name comes directly from the verb's meaning in general English: to distribute is to pass something out to its proper place. In printing, the metaphor works perfectly. Unlike composition, which collects type from storage and builds outward, distribution does the reverse, scattering type back to its home.
Distribution remains necessary wherever hot metal type is still in use, though the practice has largely vanished from working print shops. Digital typesetting eliminated the need altogether. However, historical letterpress workshops and fine printing studios that maintain metal type still rely on skilled distribution to keep their cases organized and their type inventory usable across hundreds of different jobs and font sizes.