post.First of all you have to make your signature from
any photo editing software.After made it you have to
upload it and get the link. you can do it from
/http://img97.imageshack.us/ after the upload you can
get the link.(choose direct link).
1. Now log to your blogger and navigate to
Layout > Edit HTML and expand Widget Templates
2. Find this code by using Ctrl+F
<div class='post-footer-line post-footer-line-1'>
If cant find try this
<p class='post-footer-line post-footer-line-1'>
Or
<data:post.body/>
3. Copy these code you below found
<img src='url_of_your_signature_image' style='border:0px;'/>4.Copy your image link replace with ,what i marked as red color.
5.Done.