Proofreading notation is a set of symbols and abbreviations used by editors and proofreaders to indicate changes that need to be made to a text. Two common proofreading notations are STET and DELE. STET stands for 'let it stand' and is used to indicate that no changes should be made to a particular section of text. DELE stands for 'DELETE' and is used to indicate that a particular section of text should be removed.