Where to find the signature settings in Outlook
Your signature settings live in a different place depending on which version of Outlook you use. If you use Outlook on the web (the version you access through a browser), go to the gear icon in the top right, select View all Outlook settings, then choose Mail from the left menu and scroll down to Compose and reply. If you use Outlook as a desktop process on Windows or Mac, open the File menu, select Options (Windows) or Preferences (Mac), then find Mail and look for Signatures.
The exact wording and menu order can shift slightly between versions, but the signature option is always nested under mail settings, never at the top level. If you cannot find it after checking both locations, your version may be older or your account may have restrictions set by your workplace.
Key Takeaways
- Outlook on the web uses the settings gear icon, while the desktop app uses File > Options (Windows) or File > Preferences (Mac).
- You can create multiple signatures and choose which one to use for new messages versus replies.
- Signatures can include text, links, and images, but large images or complex formatting may not display the same way on all devices.
- Changes to your signature take effect when ready for new messages but do not change signatures on messages you have already sent.
Creating a new signature or editing an existing one
Once you are in the signature section, you will see a button to create a new signature or edit one that already exists. Type or paste your signature text directly into the text box. You can format it using the toolbar — bold, italics, font size, and color are all available. If you want to add a clickable link, highlight the text you want to turn into a link, then use the link button (usually a chain icon) to paste the URL.
If you want to add an image — like a company logo or headshot — look for an image or picture button in the formatting toolbar. Click it, then browse to the image file on your computer. Keep in mind that very large images can slow down email sending, and some email clients may not display images the same way your Outlook does. A good rule is to keep images under 100 kilobytes and test how they look when you send a test message to yourself.
Setting which signature appears on new messages and replies
Outlook lets you choose different signatures for new messages and for replies or forwarded messages. In the signature settings, you will see dropdown menus labeled something like New messages and Replies and forwards. You can pick the same signature for both, or use one for new messages and a shorter version for replies. Many people use a full signature with contact details for new messages but a straightforward text-only signature for replies to keep the conversation thread from getting cluttered.
If you create multiple signatures, you can also set one as your default and then manually pick a different one each time you compose a message. This is useful if you have different roles — for example, a work signature and a volunteer signature — and want to choose which one fits each message.
Signature formatting that works across different email clients
Not every email client displays formatting the same way. Outlook on the web may show your signature perfectly, but when someone reads your message in Gmail or Apple Mail, the colors, fonts, or spacing might look different. To avoid surprises, stick to standard fonts like Arial, Calibri, or Times New Roman, and avoid very small font sizes (anything under 10 points can be hard to read on phones). Black or dark gray text is safest; bright colors may not print well or may be hard to read on some screens.
If you use a company logo or image, test it by sending a message to a personal email account and opening it in a different email client. This takes five minutes and can save you from looking unprofessional. If the image does not show up or looks stretched, you may need to resize it or switch to a text-only signature instead.
Removing or disabling a signature
If you want to stop using a signature, go back to the signature settings and select None from the dropdown menu for new messages, replies, or both. This removes the signature from future messages without deleting the signature itself — you can turn it back on later if you change your mind. If you want to delete a signature entirely so you cannot accidentally use it, look for a delete or remove button next to the signature name and click it.
Be aware that removing your signature from replies can make your messages feel abrupt, especially in professional settings. Many workplaces expect at least a name and title on every message. If you are removing your signature because it is outdated, updating it instead is usually the better choice.
Troubleshooting signatures that do not appear
If you set a signature but it does not show up on your messages, first check that you actually selected it in the dropdown menu — it is straightforward to create a signature and forget to assign it to new messages or replies. Second, check whether your workplace has restrictions on signatures. Some organizations use group policies that override your personal settings, especially on Windows computers connected to a company network. If that is the case, you may need to contact your IT department to change your signature.
If your signature appears on some messages but not others, you may have set different signatures for new messages versus replies, or you may be using a different account. Outlook can manage multiple email accounts, and each one has its own signature settings. Make sure you are looking at the right account in the settings menu.
Frequently Asked Questions
Can I use different signatures for different email accounts?
Yes. If you have multiple accounts set up in Outlook, each account has its own signature settings. When you compose a message, Outlook will use the signature assigned to whichever account you are sending from. You can set a different signature for each account, or use the same one for all of them.
Will my signature show up the same way on mobile phones?
Not always. Mobile email clients sometimes strip out formatting, colors, or images. If your signature is important for your professional image, test it by sending a message to yourself and opening it on your phone. Stick to straightforward text and standard fonts if you need it to look consistent across devices.
Can I add a legal disclaimer or confidentiality notice to my signature?
Yes, you can type any text you want into your signature, including disclaimers. However, be aware that some email clients may not display very long signatures properly, and some recipients may find long legal text annoying. Keep it brief if possible, or check with your organization about their standard format.
What happens if I change my signature after I have already sent messages?
Changing your signature only affects new messages going forward. Messages you have already sent keep the signature they had when you sent them. Outlook does not go back and update old messages.
Can I schedule my signature to change on a certain date?
Outlook does not have a built-in feature to automatically change signatures on a schedule. If you need a temporary signature — for example, an out-of-office notice — you will need to manually change it in the settings when the time comes, or use an Outlook rule or add-in if your organization has one set up.