Can I change my ED visa to a non-immigrant visa without leaving Thailand?

The conversation discusses whether it is possible to change from an Education (ED) visa to a non-immigrant visa without leaving Thailand. Several comments confirm that it is indeed possible to switch non-immigrant visa types at the immigration office, depending on the individual's circumstances, such as whether they are on a 90-day initial stamp or an extension of stay. The original poster mentions their intention to transition from a tourist visa to an ED visa for studying Thai, with plans to later obtain a job teaching.