Developer tools allow you to add custom CSS and JS code to your site. The tools are not available by default, so here are the steps to gain access: Note: Only Owner and Admin roles can access the Settings panel. If you are a Contributor, you will need to ask the site Admin to grant you Developer permissions.
1. Select the Settings icon in the gray navigation bar.
2. Click on Users & Roles subheader under Settings.
3. Select the edit link next to the user email you want to grant access to.