Adding Custom Code To Pages
Adding basic HTML + CSS code
You can easily add HTML + CSS to your pages through the Page Content Custom Code Widget. Add code by clicking on the <> icon on the right as shown below.
A Source Code editor opens when you click on the <> icon. Below you can see the code that was added in order to get the design that appears in the image above.
Javascript code
You can add <script> tags to pages . If you need a script to work on the entire site - You can add global, custom Javascript (that goes to your site's <head> section) via the General Site Settings page. When you add custom code, make sure you use the <script> tags appropriately.
It's only recommended to use this option if you know what you're doing, or you're sure you're copying the code from a reliable source.