Add a Cool Floating Button Go To Top in Your Blogger/Blogspot.

Step 1: Log in to your Dashboard--> Design- -> Edit HTML

Step 2: Click on "Expand Widget Templates"

Step 3: Scroll down to where you see this </body> tag.

Step 4: Copy below code and paste it just before the </body> tag.

<!--Back to top Start itbooster.blogspot.com-->
<a title="Back to TOP" style="position: fixed; right: 15px; bottom: 15px; outline: medium none; border: 0px none;" href="#"><img border="0" alt="Back to TOP" src="https://lh4.googleusercontent.com/_u4rBCfM4eII/TaKKxIRNY2I/AAAAAAAABl8/vTr7RoxtMkA/backtotop.png"></a>
<!--Back to top End itbooster.blogspot.com-->

 Step 5: Now Save Template You are Done.!

Thanks.