It's in option.
Yeah. So function , mm
Mm-hmm.
So , as we discussed , we have to switch on switch off whenever we want. And so , we have buttons and using L_C_D_ , or like you can use this  jog wheel and select which ever option on the L_C_D_ , and then do on and off.  Then you ha you'll have volume control. So , you you can press these buttons to increase or decrease the volume.