How can I undo a delete that just happened!

I wanted to delete one line of my registration form. The one line was highlighted and I clicked delete. It deleted all of the lines! When the message came up to undo it disappeared too fast for me to click on it.

Please help!!

You can revert any edit done in your form through the revision history tool: https://www.jotform.com/help/294-How-to-View-Form-Revision-History 

Let us know if you need more help, we will be glad to assist you.