How do i make a form on a pop-up

To make a pop-up please first add a button to your page and click on the button. Once clicked you will see the following options:

Click on the link icon in the middle, and see that you can let the button link to another link or to a pop-up. Click pop-up and then click the plus to add a pop-up, you see the following screen:

Click new pop-up and choose your pop-up, you have now added a pop-up to your button. You can now change anything on the pop-up just as you would do on the page:

 After you have closed the pop-up and want to edit it again, just click the button once more. Click on the linking icon again and then click the pencil icon.