Creating "Thank You" pages is pretty easy. Have a look here to get an idea how to create those pages in all three modes.

For your QuickMode forms open your form. On the right-hand side you will see the form properties. Now please follow the steps below:

1. Within the form properties, put a checkmark in the box that says "Last page is thank you page."
2. Click on the SAVE PROPERTIES button.
3. Now create a new page (Page 2)
4. Click on the EDIT link under the page properties (beside 'intro'). On that page, you can include HTML, images, etc. So add the text/images that you want, and then click on the SAVE button at the bottom of the screen.
5. Save the form.

You do not need to add any special coding or scripts. The form should progress from the first page to the thank you page on a successful submit.

For Easy- and Classicmode we now assume that you have already set up a single page form with a working submit button:

1. Now create a second page
2. Put the desired thank you text into the page (in general "static text" element)
3. Easymode -> click "Form Settings" on the top of the screen  / in Classicmode click "Edit Form" on top of the screen
4. Now click Scripts->Submitted Script-> custom and click on "generate Code Framework
5. Within the generated script replace  
   
   

   // do whatever desired on success

    

   with
   
   

   ff_switchpage(2);

    

   Save the Form and test it out.