I understand this thread has long since ended, but I thought if I replied to this further, it might help someone like me looking back through the questions to solve their mystery. I am new and had the exact problems with the paypal "add to cart" button (from the paypal site, not BV) not showing up on the builder page. When I created the button in paypal, I copied the html code and right clicked on the text of the item I was offering and then clicked on "properties" and pasted the html code into that box's area. It showed up when I did the default preview but no where else, not on the builder page. And it took a lot of time to position it into the place I wanted it to be. I figured there had to be a way that a button would show up on the builder page, so I started looking in the forum. The reply to insert an html box was perfect. (I didn't know how to do that.) I have now gone back and right clicked my text again and then "properties" and deleted the text in the bottom of the box so the blue text in the top would go away. Now I am remaking all the buttons and pasting the html code from paypal into the html box I got from following the directions from Lady Eye and it has worked perfectly. I now have an "add to cart" button on the builder page. Hope this helps.