1) Add CSS in the Blogger Template Designer This is a simple and best option for those who are new to the world of blogging. In this method you need not worry about the error to be faced while adding CSS codes into blogger template. This customized preference has been provided by the Blogger’s Template Designer and you can change any aspect of your blog by adding CSS codes into the Add CSS field located under Advanced Tab. The best part of this tool is that you can see the return instantly in a live preview beneath the editor. Step-1: Login to your blogger account at blogger.com/home and click on the particular blog. Step-2: From your blog Dashboard, go to the Template Tab of your blog and click on Customize button. Step-3: Under the Advanced Tab menu on left pane, scroll down and select Add CSS. However, if you are using a third party Blogger Template, there may be only Add CSS sub-menu on the right pane.