Can I apply for a re-entry permit and the first extension of a Non-Immigrant O visa before leaving Thailand?

The user inquires about the feasibility of obtaining a re-entry permit and applying for their first extension of a Non-Immigrant O visa prior to leaving Thailand for a short trip. The response clarifies that the ability to apply for the extension is dependent on the initial stay date indicated on the visa, noting that an application can be made 30 days before the expiration of the initial 90-day period. Additionally, it confirms that a re-entry permit can be purchased before departure to retain the same admission date upon returning.