@Tod ********
I'm on an ED visa/extension right now. I have not canceled my ED visa. The last time I extended my ED visa in Section N, on Jan 27, I asked the immigration officer about changing from an ED to Volunteer visa. He brought me to another immigration officer in the same section. I showed her my foundation documents and asked about changing from an ED visa to a Volunteer visa. She told me I will need to leave Thailand to apply for a volunteer visa. I also talked with the immigration officer in another section when I changed from a TR visa to an ED visa. She told me that it is not possible to change from an ED visa to a Volunteer visa in country.