To add html to a page, click the 'HTML' icon in the html editor.
A HTML Source editor will pop-up where you can enter your HTML. To save, click the 'Update' button in the lower left corner. To cancel and discard any changes, click the 'Cancel' button in the lower right corner or click 'Close' in the top right corner.
Your HTML will appear in the HTML box so that you can preview it and make necessary changes. To save, click 'Update', or press 'Cancel' to cancel.