There is an HTML source button in the WYSIWYG editing toolbar that Site Builders and Site Managers can use to make simple HTML edits, including using the optional HTML classes, on certain page and widget types.
NOTE: Only the supported HTML tags that correspond to the WYSIWYG actions and the optional HTML classes are allowed on the Berkeley Web Builder platform. Any unsupported tags will be stripped upon saving.
How to edit the HTML source
Select the button that says "Source" on the 3rd line of the WYSIWYG toolbar; see Figure 1, below.
This will change the look of the "Body" field to show HTML tags and plain text rather than the formatted text. The other WYSIWYG buttons will be greyed out and unavailable while the HTML source button is in use. Select the HTML source button again to go back to the formatted view.
See Figure 2, below, for an example of the HTML source of a Basic page.