Can I extend my DTV visa in Thailand, or do I need to leave the country before it expires?

The user is inquiring about options for extending their DTV visa, which expires before their planned departure flight. They are considering a border run to another country and returning, as there seems to be issues with in-country visa extensions, which require resubmitting all documentation. Comments suggest a border run is a common solution and that it may be easier than dealing with the extension process. Recommendations include visiting places like Vietnam or Singapore and the possibility of a same-day land crossing.