Beeps and tones

Im completely new to this and just bought a GMR25 radio from Rugged Radios. I cant seem to find out how you turn off the beeps? Have scrolled throughout the menu but still cant find it. Any help would be greatly appreciated.

Bizarrely, the beep function and display icon isnt mentioned in the manual? Cant help, sorry. Maybe a hidden extra menu? I hope you find somebody who has the answer.