How can you change the registration Redirection URL ?

1.How can you change the registration Redirection URL?
From a previous topics i read that you can't change the navigation links

2.My purpose is to add a verification image during registration (the guide that i found on the forum didn't help)
Please make a guide step by step with images if it's possible

I think this Tutorial explains it pretty well. If you have problems on a specific point, feel free to ask again.

I want to add, that this part ("Come back into headers and down to add a link.") in step 6 has slightly changed since the last update. Go to "General / Homepage / Nav Links / Create a custom menu" instead.