How to Customize CSS in Blogspot. The Blogger Template Designer allows you to insert custom CSS code to change your blog's appearance. You can access the advanced settings of the Template Designer ...

If you find that you want to customize the overall size of your blog layout, you can do this directly from Blogger's Template Designer. You don't need any HTML or CSS knowledge to do this.

Google is testing a new tool to give Blogger publishers more control over the layout of their blogs.