Steps on how to create an email signature:
Add a new block to the end of your email layout.
Add a column element if you want to have an image and a text
Drag an image element into one box
Drag a text element to the other box
Double-click on the image element to add the image
Change the text you want to have in your signature
Change the column widths accordingly
Add the links
Save as a block in the template (so you can reuse it)
If you are not using Chamaileon yet, you can register and access it here.