Hello Charlie welcome to the forum and welcome to the world of radio. As with any radio or electronics period reading the user manual is key to fully understanding the operation of your new device. The user manual in most of the Chinese radios is written in rather poor “ching-lish” and really doesn’t provide much help. I do not have one of the radios that you have purchased, however there is probably a youtube video or several explaining some of the features of the radio and how to use them. I have found that youtube videos from regular people tend to be informative than poorly written manuals. Good luck on your radio journey and hope you find what you need.