- Sign in to Outlook.com
- Select Setting at the top of the page.
- Select View full setting
4. Go to Mail then select Compose and reply. Under Email signature, type your signature and use the available formatting options to change its appearance.
Note: You can have only one signature per account.
If you want your signature to appear at the bottom of all new email messages that you compose, select the Automatically include my signature on new messages I compose checkbox.
If you want your signature to appear on messages that you forward or reply to, select the Automatically include my signature on messages I forward or reply to checkbox
Select save and done.
Manually add your signature to a new message :
Go to your mailbox and choose New Message.
Type your message, and then choose Insert Signature at the bottom of the compose pane.
When your email message is ready, choose to Send.