Asa Go 16 remote control and actuators programming group of roller shutters

I have 4 roller shutters with ASA motors, operated by an ASA GO-16 remote control.
I have switched off the power for each roller shutter and switched them on in turn and each roller shutter is programmed on a separate channel.

I want to create a group on channel 16 for all the roller shutters so that they are controlled simultaneously.

Once I have programmed the group, I lose the ability to control the roller shutters individually.

Please give me any suggestions on how to solve my problem.