The first step is navigating to Form Library and choosing the form that you want to edit.
From the Form Settings menu bar choose Submission.
3. Here you can leave the Redirect option selected in the first dropdown, and then choose either Outside URL or Instapage page in the second dropdown.
NOTE: In order for your landing pages to appear in the list, they have to be published. Redirects are done using the URL of a page, so the unpublished landing pages won't appear in the Redirect to Instapage menu.
If the page is not created inside your Instapage account, or it's inside a different workspace, you can use the "Outside URL" option by entering the URL of your destination page in the text field provided.
Don't forget to create a custom “Thank you Message” and set for how many seconds the message will be displayed.
You can also select the "Thank you" message and remove it. This will display a "Processing..." message once the form is submitted. If you wish to translate this message into another language or delete this as well, and there will be no text displayed, you can do so by using the code from this article here: https://d.pr/y0Qwiy.
NOTE: The redirect option cannot be used together with the download option (learn more about the download option here: https://d.pr/5UI83b). They are mutually exclusive and only work separately. You can either choose a redirect or a file download as an automatic action after the visitor submits the form, not both.