This article explains how to edit the subject line and body of an email you received in Outlook for Microsoft 365, Outlook 2019, Outlook 2016, Outlook 2013, or Outlook 2010. This is useful when emails don't contain enough information to organize them.

Here's how to change the subject line of a message you receive in Outlook.

Double-click the message you want to edit to open the message in a separate window.

Place your cursor in the subject line and press Ctrl-A on your keyboard to select the entire subject line.