Printer's Directive is a term used in the printing industry to refer to the instructions given by a printer to a typesetter or editor. The most common directive is 'STET', which is an instruction to the typesetter or editor to ignore any changes they have made and leave the text as it was originally written. STET is Latin for 'let it stand'. Printer's Directive is an important part of the printing process, as it ensures that the text is printed accurately and without errors.