Step 1: Once you have selected the page you want to edit, go to the "Choose Theme" tab.

Step 2: Click on the "All themes" tab. There you can select the "Custom HTML" theme. There you can select the "Custom HTML" theme.

Step 3: Skip the "Modify Theme tab on go to the "Edit Content" tab.  Once on the "Edit Content" tab, click on the HTML area and a box will appear on the left hand side where you can add your HTML code. 

Step 4: Complete editing your Page and publish.  

Step 1: On the "Choose Theme" tab, select a theme other than the Custom HTML theme 

Step 2: Click on the "Modify Theme" tab. There you can select the "Custom HTML" option with the "Edit Page Layout" section

Step 3: Once you are on the "Edit Content" tab, click on the HTML area and a box will appear on the left hand side where you can add your HTML code.   After you have added the code click the "Done" button

Step 4: Complete editing your Page and publish.  

When editing text in the content areas, the last button in the toolbar is the “view source code” button. This is your HTML editor. You can use the HTML editor to fine tune your edits.

NOTE: Use HTML editing at your own risk!

Using standard HTML code you can insert additional images and use CSS rules to format text.

NOTE: When using HTML to insert images, the images must already be hosted/uploaded.

Keep in mind that edits made using the HTML editor will not appear in real time until you toggle back to standard edit mode.