What steps should I take to leave Thailand and return with my approved DTV while on a student visa?

The individual is currently on a student visa and has had a DTV approved after applying in Cambodia. They seek clarification on whether they can exit Thailand without a re-entry permit and return using the DTV. Comments suggest that if they are still on the initial student visa, they can simply wait for it to expire and then perform a border run. If they have an extension of stay, they may need to cancel the extension with documentation from their educational institution before leaving.