OpenGD77

I may be using wrong terminology. But there is tg9 on top in white and the talk groups I have created below in blue. I cannot change anything in tg9 and the lower list in blue changes when i scroll the knob. how do i get the upper part to change?

how do I turn off dual watch and how do I switch between a and b on my RT3S?

I have an RT3S with the Open GD77 firmware installed. I cannot switch between A and B. also how do i turn off this feature and just show one channel? Thank you for ay assistance you can provide.