How can I make a thank you page. I have a php-inquiry and I want people after they sent their inquiry to come to a thank you page within the blog.
What do I have to do, so that the Thank You page doesn't appear in the menu bar or anywhere else, and it only appears after someone submitted the inquiry form.

Thanks in advance,

You can exclude any page you want from the menu bar by adding it's id to ATO -> Page Menu Bar -> Exclude pages from Page Menu Bar?

To get the ID of the page, edit the page and you will see '....action=edit&post=XX' in the address bar. XX is the ID of the page.