On the Tools menu, click Options, and then click the Mail Format tab.
Click Signatures and then click New.
In the Enter a name for your new Signature box, enter a name.
Under Choose how to create your Signature, select whether to start from scratch or use an existing signature.
Click Next.
In the Signature text box, type the text you want to include in the signature. You can also paste text to the Signature text box from another document.
To change the paragraph or font format, select the text, click Font or Paragraph, and then select the options you want. These options are not available if you use plain text as your message format.
Uncheck "Don't use when replying or forwarding" box.
Click Finish.
Click Okay.