How to Create a Signature for Your Outlook 2013 Messages
Type the text of the signature you want in the Edit Signature box, and add any formatting you want. Click OK.
To change the font, size, color, or other text characteristics, use the buttons just above the text box. If you're more comfortable creating highly formatted text in Microsoft Word, you can create your signature in Word and then select and copy it to the Edit Signature box.
Your new signature is now saved, and the Signatures and Stationery dialog box closes.