Steps are given below:-
step 1 - Go to Dashboard
step 2 - click on send single message option.

step 3 - then click on send to group option.

step 4 - select instance and submit.
Steps are given below:-
step 1 - Go to Dashboard
step 2 - click on send single message option.

step 3 - then click on send to group option.

step 4 - select instance and submit.