Where to find your signature settings in Outlook
Your signature lives in Outlook's settings, not in your email itself. The path depends on which version you use — Outlook on the web (the browser version) and Outlook desktop (the program you read) keep signatures in different places.
If you use Outlook on the web, go to the gear icon in the top right corner, then select "View all Outlook settings". From there, click "Mail" in the left sidebar, then "Compose and reply". You'll see a box labeled "Email signature" where you can edit or replace what's there.
If you use Outlook desktop on Windows, open Outlook and go to File > Options > Mail > Signatures. On a Mac, open Outlook and go to Outlook > Preferences > Signatures. Both routes take you to the same signature editor where you can make changes.
Key Takeaways
- Outlook stores signatures in settings, not in individual emails — changing it once updates every new message you send.
- Outlook on the web uses the gear icon and "View all Outlook settings", while desktop versions use File > Options or Outlook > Preferences depending on whether you're on Windows or Mac.
- You can create multiple signatures and choose which one to use for each new email, or set a default that appears automatically.
- Signature changes take effect when ready for new emails but do not change signatures on messages you've already sent.
Editing or replacing your current signature
Once you're in the signature editor, you'll see a text box with whatever signature you currently have. You can delete it entirely and type a new one, or highlight part of it and change just that section. Outlook lets you format text the way you would in an email — bold, italic, font size, color, and alignment all work the same way.
If you want to add a line break or space between your name and your title, press Enter where you want the break. If you want to add your phone number or website, just type it in. Outlook does not automatically turn these into clickable links in your signature the way it does in the email body, so if you want a link, you'll need to highlight the text, then use the link button in the formatting toolbar.
Creating multiple signatures for different purposes
You can create more than one signature and pick which one to use each time you send an email. In the signature editor, look for a button or option to create a new signature — it's usually labeled "New" or has a plus sign. Give it a name like "Work" or "Formal" so you can tell them apart.
Once you've created multiple signatures, you can set one as your default (the one that appears automatically in every new email), and then manually switch to a different one when you need it. To switch signatures in a draft email, look for the signature dropdown in the compose window — it's usually near the bottom of the message.
Setting a default signature for new emails
If you have multiple signatures, you can choose which one appears automatically when you start a new email. In the signature settings, look for a dropdown menu next to "New messages" or "Default signature". Select the signature you want to use by default, then save your changes.
This default applies only to new emails you compose from scratch. If you reply to someone or forward a message, Outlook may use a different signature or none at all, depending on your settings. You can change this behavior in the same settings area — look for options about replies and forwards.
Adding images or logos to your signature
You can insert an image into your signature, though the process is slightly different in Outlook on the web versus desktop. In Outlook on the web, click inside the signature text box, then look for an image icon in the formatting toolbar. In Outlook desktop, use the Insert menu while you're editing the signature.
Keep images small — a logo or headshot should be no more than 100 pixels wide. Large images make your signature slow to load and can cause problems when recipients forward your emails. If you're adding a company logo, ask your IT department whether they have a preferred size or format.
Troubleshooting signatures that don't appear
If you've created a signature but it's not showing up in your emails, check whether you set it as the default. Go back to your signature settings and make sure a signature is selected in the "New messages" dropdown. If nothing is selected there, Outlook won't add a signature automatically.
If you're replying to an email and no signature appears, that's usually by design — Outlook often doesn't add signatures to replies unless you've specifically told it to. Go back to your signature settings and look for an option about "Replies and forwards". You can turn this on if you want your signature on every message, including replies.
Moving or copying a signature between Outlook accounts
If you have multiple Outlook accounts or you're switching to a new computer, you may want to copy a signature you've already created. In Outlook desktop, signatures are stored as files on your computer. On Windows, they're usually in a folder called "Signatures" inside your AppData directory. On a Mac, they're in Library > process Support > Microsoft > Office > Outlook Signatures.
The easiest way to move a signature is to recreate it in your new account by copying and pasting the text from your old signature into the new one. If your signature has images or complex formatting, take a screenshot of the old one so you can match it exactly in the new account.
Frequently Asked Questions
Can I have a different signature for each email account?
Yes. If you have multiple Outlook accounts set up, you can create separate signatures for each one. In the signature settings, look for a dropdown that lets you choose which account you're editing the signature for. Create a different signature for each account, then set a default for each one.
Why does my signature look different when someone receives my email?
Formatting can change depending on how the recipient's email client displays it. Bold text, colors, and fonts may not show up the same way in every email program. Stick to straightforward formatting and common fonts like Arial or Calibri if you want your signature to look consistent for everyone.
Can I add a disclaimer or legal notice to my signature?
Yes, you can type any text you want into your signature, including disclaimers or legal notices. Just keep it brief — long signatures can annoy recipients and take up space in their inbox. If your company requires a specific disclaimer, ask your IT department for the exact wording.
Does changing my signature affect emails I've already sent?
No. Changing your signature only affects new emails you compose after the change. Emails you've already sent keep their original signature. If you need to update a signature on a sent email, you'll have to resend the message.
What if I don't want a signature at all?
Leave the signature text box empty and make sure nothing is selected in the "New messages" dropdown. Outlook will then send emails without any signature. You can always add one back later by following the same steps.