How do I obtain a re-entry permit at the airport when traveling on a 1-year NON B visa in Thailand?

The user is inquiring about the process of obtaining a re-entry permit while planning to travel from Thailand to Dubai. They are specifically asking about the time it takes to acquire the permit at the airport, the location within the airport, and whether they need to go to the immigration office. According to comments, if they hold a 1-year NON B visa, it is typically a multiple-entry visa and a re-entry permit may not be necessary. However, if they have an extension, obtaining the permit at Suvarnabhumi Airport is recommended, as it can be secured quickly (in about 10-20 minutes) at the re-entry desk located after security and before passport control.