Total is a very modular theme making it easy to tweak and customize to your liking. Below you will find various snippets that you can use to make adjustments to the theme. While some of these could be added as a new option to the Customizer I have decided against it because it just adds more bulk and slows things down. Sometimes using a snippet is best. Make sure you are using a child theme for all PHP edits. For CSS edits you can use the Custom CSS panel or your child theme, either one is fine.