Insert a Custom Signature in Blogger Posts
The main reason that comes to mind is that they look pretty cool. You will need to have your signature already prepared, as this tutorial isn't going to explain how to make one. All you need is a suitably sized graphic image (something around 160 x 70 pixels is about as big as I personally would go), be it a jpeg file or something similar, and host it somewhere free, like photobucket.com. Once you've got it uploaded, you're ready for the steps below.
Step 1
Go to your Blogger Dashboard >> Go to your Blog Settings >> Go to Formatting >> Scroll down to the Post Template box.
Step 2
Insert this code into the box:
Step 3
Copy the url of your image and paste it into the code where you see the words "sig URL". For example, when you're done it should look something like this -- with the part in bold being the actual address of your own jpeg.
Things to Note
If you use this method, the image will appear in your blogger control panel when you create your posts. You will see it there before you enter your text:
1. If you accidentally delete the image while typing your post, you will have to close and start a new post to get the image back in there.
2. The image will only show up in the posts you create from that moment forward, they will not show up in your previous posts.