Go to Elements in the menu on left side of page where you want to insert html or change existing html, click on elements tab in the drop down menu . Search for Html / Page embed tab and click Embed Html. There click on Insert html ( the letters are light blue). You will get Html Widget in which. You can delete or modify the html there. If needed, paste your new html in the body html section. Click OK and come back to the page. This is for new website builder.