What should I know about extending a tourist visa and transferring it to a new passport in Thailand?

Don't make my mistake. I went to do a 30-day extension on a tourist visa at Chaeng Wattana. But I had to get a new US passport since I was out of pages. While the new passport is canceled (with a stamp and hole punches), you still need the official document to transfer your visa to the new passport and before you can extend. I think you can do both at once, but you have to officially transfer it.