The Master Channel List is the one true source for every channel. Different radios hold different numbers of channels, so you can filter the list down to just the ones you want to manage. Tick as many boxes as you like: within a group they add up (Ham + Aviation shows both), while different groups narrow each other (Ham + Repeaters shows ham repeaters only). All clears everything and shows the full list. The same channel can appear under more than one filter, but it's always one channel — no duplicate copies. Some filters add a dropdown to narrow things further.