Where to find the signature settings

An email signature is a block of text that appears at the bottom of every message you send — typically your name, job title, phone number, or a company disclaimer. In Outlook, you add this once in settings, and it attaches automatically to all new emails.

The location depends 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 corner, then select View all Outlook settings. If you use Outlook as a desktop process on Windows or Mac, open the process and go to File > Options (Windows) or Outlook > Preferences (Mac).

Once you are in settings, look for the section labeled Mail or Compose and reply. This is where signature controls live in every version of Outlook.

Key Takeaways

  • Signatures are created in Outlook settings, not in individual emails, so they explore to all messages you send automatically.
  • You can create multiple signatures and choose which one to use for each email, or set one as your default.
  • Outlook on the web, Windows desktop, and Mac desktop all have signature settings in slightly different locations but work the same way.
  • Signatures can include text, links, and images, but keep them brief so they do not make your emails harder to read.

Creating a signature in Outlook on the web

In Outlook on the web, after you reach the Compose and reply section, you will see a box labeled Email signature. Click inside the text field and type or paste the text you want to appear at the bottom of your emails.

You can format the text using the toolbar above the box — make text bold, italic, or change the font size. If you want to add a clickable link (such as a website or email address), highlight the text you want to link, click the link icon in the toolbar, and paste the web address or email address.

When you are done, scroll down and click Save. Your signature will now appear on all new emails you compose. If you want to add a second signature for a different purpose (such as one for work and one for personal use), look for the option to Create new signature and repeat the process.

Creating a signature in Outlook desktop (Windows)

In the Outlook desktop process on Windows, go to File > Options > Mail > Signatures. You will see a window with three sections: a list of your signatures on the left, a preview in the middle, and formatting options on the right.

Click New to create a signature. Outlook will ask you to name it — use something clear like "Work" or "Professional". Type your signature text in the large box in the middle. Use the formatting buttons above it to adjust font, size, color, and alignment. You can also insert a hyperlink by clicking the link icon.

Once your signature is complete, decide whether to use it as your default. Under Choose default signature, select which signature should appear automatically on new emails. You can set a different signature for replies if you want. Click OK to save.

Creating a signature in Outlook desktop (Mac)

On Mac, open Outlook and go to Outlook > Preferences > Signatures. The layout is similar to Windows: you will see a list of signatures on the left and a text box where you type your signature on the right.

Click the plus sign to create a new signature and give it a name. Type your signature text in the box. Use the formatting toolbar to change fonts, colors, and alignment. To add a link, highlight the text, click the link icon, and enter the web address.

At the bottom of the window, choose which signature should be your default for new messages and which (if any) for replies. Close the preferences window, and your signature is ready to use.

Adding images or logos to your signature

All versions of Outlook let you insert an image into your signature — useful if you want to include a company logo or professional photo. In Outlook on the web, click the image icon in the compose toolbar while editing your signature. In the desktop versions, right-click in the signature text box and select Insert Image or look for an image icon in the toolbar.

Choose the image file from your computer. Keep file size small (under 100 KB) so your emails do not become slow to send or receive. Position the image where you want it in the signature — typically at the top or bottom — and resize it by dragging the corners if needed.

Test your signature by composing a new email and checking how the image appears. If it looks too large or out of place, go back to settings and adjust the size.

Removing or changing your signature

If you no longer want a signature on your emails, go back to the signature settings in your version of Outlook. Find the signature you want to remove and click Delete. If that signature was set as your default, Outlook will ask you to choose a new default or confirm that you want no signature at all.

To change an existing signature, open it in the signature editor, make your edits, and click Save or OK. The changes will explore to all new emails you send from that point forward — it does not change signatures on emails you already sent.

If you have multiple signatures and want to switch between them, you do not need to change your default. When you compose a new email, look for a signature dropdown menu in the message itself (usually near the bottom) and select the one you want to use for that particular email.

Common signature mistakes to avoid

The most common mistake is making your signature too long. A signature should be three to five lines at most — your name, title, phone number, and maybe a website. Anything longer makes your email harder to read and can look unprofessional, especially in back-and-forth conversations where the signature repeats on every reply.

Another mistake is using too much formatting or too many colors. Stick to one or two fonts and a straightforward color scheme. Some email clients do not display fancy formatting the same way, so what looks good in Outlook might look broken to the person receiving it.

Do not include personal information you would not want public — avoid home addresses, personal phone numbers, or financial details. If you are using Outlook for work, check your company's email policy; many organizations have rules about what signatures must include.

Frequently Asked Questions

Can I use a different signature for replies than for new emails?

Yes. In Outlook settings, you can set one signature as your default for new messages and a different one for replies. Some people use a full signature with contact details for new emails and a shorter version for replies to keep conversations from getting cluttered.

Why is my signature not appearing on emails I send?

Check that you set a default signature in your settings — if no default is chosen, Outlook will not add one automatically. Also verify that the signature is assigned to the email account you are sending from; if you have multiple email accounts in Outlook, each one can have its own signature. Finally, check that you are composing new emails, not replying, if you only set a signature for new messages.

Can I add a signature to emails I already sent?

No. Signatures only appear on new emails you compose after the signature is created. You cannot add a signature to a message after you have sent it. If you need to send a corrected version, compose a new email.

What happens to my signature if I change my password?

Your signature is stored separately from your password, so changing your password does not affect it. Your signature will continue to appear on all new emails.

Can I use HTML code in my signature?

In Outlook on the web and the desktop versions, you can paste HTML code directly into the signature box, and Outlook will render it as formatted text. However, stick to basic HTML — complex code may not display correctly in all email clients that receive your messages.