Create Button That Turns Into Form

Hello! I don't know if I'm asking this question in the best way, but essentially what I'm trying to do is the same thing I used to do in 7.0, where I would be able to turn a form into a clickable button that, when clicked, creates a form pop-up. I've tried making this in buttons and forms separately in 7.1, but absolutely nothing seems to have this option in standard or advanced style settings.

If this was a removed feature, does anyone know how to do this with coding? Keep in mind I'm not a coder, so anything you give me will require hand-holding. 

Use Anything Lightbox Plugin

Easy to do with this plugin 

1. Create a block or page (with contact form)

2. Insert a button

3. Insert link to button with format

• If you use contact page: #lightbox>page-url, eg: #lightbox>contact

Plugin documentation is detail 😉 You can contact plugin author to get support.