You can edit your theme code to make detailed changes to your online store. Most of the files that make up a theme contain Liquid, Shopify's templating language. Theme files also contain HTML, CSS, JSON, and JavaScript. Edit the code for a theme only if you know HTML and CSS, and have a basic understanding of Liquid.
Before you customize your theme, it's a good idea for you to Duplicate your theme to create a backup copy. This makes it easy to discard your changes and start again if you need to.
To edit your theme code, please follow the steps:
Step
From your Shopify admin, go to Online Store > Themes.
Click Actions > Edit code.
