I've a problem .. the size of writing in the final landing page isn't the same in the preview..why it's changing!

Hi Anass - It looks like you’re setting some custom fonts/font weighting using .css. That .css won’t render out in the editor, only on the published paged, which is why you’re seeing the difference. Because the font you’re calling in the .css is wider, it’s pushing to the second line on your buttons. If you just widen them a bit, that should solve the problem on your published page.