I have now uploaded the file for this page.
Please see PM
On my local machine if I preview (F12) in the browser the page appears OK
To view and amend the page in DW
I click inside the page I go to Webassist tab> Forms> Insert New Form
after a while (20 seconds) the screen CSS Form Builder Add Form appears.
To see the form I have to click the on right hand side which says "Click here to Preview this page in a browser"
This does not give the ability to see the immediate amendments as the excellent video at