CA on all channels

[Met-AL]

Is there a way to grant CA for all channels at once?

[Katana*GFR*]

Yeah, make sure they are in the top channel and grant them CA there.
Then they will be CA in the main channel and all subs.

have to repeat this for every Main Channel tho.

[ANR Daemon]

Depends on Your needs and server usage, You may give identical rights to the server admin and channel admin. So if You want to give a "all channel admin" right to someone, just make it a server admin.

[BHKai]

You can do it fast if you select the persons name, right click, and press h.
As they move down the channel list you keep doing that. And if you have the right click button on you keyboard you can go pretty fast.