Since the editor is a WYSIWYG text editor for HTML documents, it was important to implement a function that would allow toggling the edit modes. Advanced users benefit from this as they can edit the document in the HTML format as well.
the editor editor has two editing modes, between
which you can switch by clicking the Show Code/Design
button from the toolbar:
The next two images illustrate the Design and the Code view for a certain page content:
Design view:
Code view: