Learning how to change my signature in Outlook will be helpful if there is a need to modify the contact information that you are using. In the new Outlook version or web-based version, one should click on Settings, navigate to Accounts > Signatures, make changes in the stored signature and click on Save. In case of classic Outlook for Windows, one needs to select File > Options > Mail > Signatures, select the email signature and make necessary changes. One can use his/her name, position in the company, phone number and any other necessary information. It is recommended to check the automatic signature settings for new messages and replies.