You may link to a lightbox form through text links, image links, or floating buttons. When published in lightboxes, forms will appear to be floating above the page and will definitely become the center of attention.
Retrieve the lightbox code by selecting the Publish button within the form builder in the Form Editor, then go to Embed → Lightbox. Here are some details about each option:
If you want to publish your form in a lightbox on Blogger, you’ll need to publish the post in order to see how your form interacts with the page. None of the lightbox options above work in the preview mode of your Blogger post.