I put everything I want on the scanner but they are all in one big group. What settings would I need to change so that each "group" is a separate city?
You would need to change the scanlist memberships of each scanable objects (Conventional channel, talkgroup).
You can do that by selecting the objects you want to change, then right clicking on one of the selected objects, and choose the Edit Objects option from the menu that appears. You can then change the scanlist memberships at the bottom of the screen and click apply to update them.
Repeat as needed to get them in the scanlist you want them in, and then upload the new information to the scanner.
Mike