Can I change a 30-day visa exemption for a 60-day visa in Pattaya and then extend it?

The initial question concerns the ability to convert a 30-day visa exemption into a 60-day visa in Pattaya, followed by a possible 30-day extension. Responses clarify terminology, distinguishing between 'visa on arrival' and 'visa exempt entry', and suggest that it is feasible to extend the 30-day exemption at a local immigration office. Additionally, the topic of extending a 60-day tourist visa for another 30 days is discussed, with insight into potential fees and regulations that may change after November 1.