Ok, I can help you out here.
Enter the talkgroup number(s) you want to listen too.... for example,
36592 8ef A C3-04 Cntrl 4-COMM Dispatch - Central
Any you don't want to listen too, Lock Out or just don't program into the scanner.
Then you need to scan with the bank closed and it will only scan and stop on the talkgroup(s) that you entered manually instead of any talk group that comes up. To close the bank, hit manual, hit function then the .delay button. Then as the scanner scans, instead of having a Plus + sign, there should be a Minus - sign indicating the bank is closed.