Hi, and thank you for your question. My name is ***** ***** I'll be assisting you today.
Please carry out the following steps on a computer to change your signature for your email:
First off, open up www.yahoomail.com and login in to your account when prompted.
Next, in your email page, click on the gear icon at the top-right and select Settings.
Click Accounts at the left, and then click your Yahoo account listed at the right.
Scroll and select Append a signature to the emails you send.
Enter or edit your signature text in the Signature field.
Click Save. This should do it.
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