What options do I have to extend my Non-Immigrant O visa while in Thailand?

The user wants to extend their Non-Immigrant O visa, which is set to expire in a few days, by ten days due to family commitments. They learn from commenters that a 10-day extension is not available; however, they can apply for a 60-day extension for visiting Thai family, provided they haven't already used that option during their current entry. This extension would need to be applied for at the local Thai immigration office, with a fee of 1900 Thai baht.