Editor’s mark

STET

This Latin term tells a proofreader to ignore a previous change and leave the original text as is.

Editor’s mark" refers to a proofreading instruction, and "STET" is the Latin-derived term editors use to tell typesetters to ignore a previous change and leave the original text as is. It’s often written in the margin with a dotted line pointing to the text in question. The word itself means "let it stand," which is exactly what the editor wants—no alterations. Think of it as a way to undo a correction.