Revision marks
Also: revision asterisks · coloured pages
Revision marks are the asterisks in the right margin of a shooting script that flag exactly which lines changed in the latest revision. Paired with a rotating sequence of coloured pages — blue, pink, yellow, and so on — they let a crew see at a glance what is new without re-reading the whole script.
Each round of changes to a locked script gets its own colour and a marked set of pages. An asterisk in the gutter beside a line means that line changed in the current revision; a reader scans the margin to find every edit.
The colour rotation (white, blue, pink, yellow, green, and onward) gives each revision a recognisable identity, so "shoot off the pinks" is an unambiguous instruction on set. Revision marks and coloured pages together are the change-tracking system of professional production.