When you edit a page, you can either view the regular Editor view, which allows you to modify the front-end, or the HTML/Code view, which allows you to configure the editor text box from its code source.
- Navigate to the desired page
- Ensure Live Edit is turned on
- Click into the Editor by clicking anywhere in the Editor container area
- Select the Code View icon on the second row of the toolbar
- You are now in the HTML view of the Editor