How to make someone a co owner

[minecraftnoob]

I recently started playing Op skyblock and me and my best friend want to play on the same island but i am not understanding how to make him a co owner so can someone please help me.

 

[Phantomx]

Type /is promote (your friends ingame name)

 

[minecraftnoob]

Ok thanks for replying to my post

 

[Zqxys]

Type /is promote (your friends ingame name)

do that a few times since if you do it only once you'll promote him to mod or admin