Change the subject line of an email message in Outlook

1. For classic Outlook, double-click a message to open it in a new window, then select anywhere in the Subject line.

2. Press Ctrl+A to select the whole line, then type a new subject line.

3. When you're done, select   Save, or press Ctrl+S.

For more info and caveats, see Edit an email subject line.

Note: If you're creating a new message, just select the subject and type a new line.

1. In new Outlook, open the message whose subject line you want to change. 

2. In the subject line, click and drag to highlight the words you want to change.

3. Type the words you want in the subject line. 

For more info and caveats, see Edit an email subject line.

1. n Outlook for Mac, open the message whose subject line you want to change. 

2. In the subject line, click and drag to highlight the words you want to change.

3. Type the words you want in the subject line. 

For more info and caveats, see Edit an email subject line.