Hi Doug - thanks for getting in touch.

Unfortunately our editor has been designed to enforce strict heights and widths (as well as absolute positioning) of all elements so as to ensure they will render properly across all supported browsers As such, using responsive/adaptive design techniques are not really supported at this time.

I know this is not the answer you were looking for but I hope it helps to clarify things. If you have any further questions, please let us know.

Cheers,

Jacquelyn | Unbounce Customer Success