Google adds support for multiple signatures in Gmail
To make use of the new feature, which Google says will be available by default, simply create multiple signatures by heading to Gmail's Settings / General. From there, choose Signature / Create New, and you should be able to create multiple signatures.
Creating multiple signatures is easy, but let's see how you can put them to good use. After you create at least two signatures, you'll be able to switch between them by opening the signature menu in the compose action toolbar.
Google announced the support for multiple signatures in Gmail will be rolled out starting today and may take up to two weeks to reach all devices. The new feature is available for all G Suite users, as well as Gmail users with personal Google Accounts.