How can I book an appointment for a marriage visa at Chaengattana if I can't find the option on the government site?

The user is seeking assistance with booking an appointment at Chaengattana for a marriage visa application, as they cannot find the specific option on the government website. They are unsure whether to select 'visa issuing and changing type of visa' from the drop-down menu, especially since it mentions there is no fee for the latter. One commentator clarifies that if the user entered as Visa Exempt, they are applying for a new visa, whereas entering on a Tourist Visa means they will be changing their visa type.