I was thinking that if you want to start over or later when we have multiplayer you can look to the kingdom overview to find the world seed . Maybe it can be a possible way to link the other players in multiplayer.
Ctrl + L Shift + C brings up the cheat bar. Typing in world_seed gives you the seed number if you missed it on the starting location screen.
The “cheat bar” is actually the console, and you should be able to access simply by typing
Ctrl + C.
Thanks @jomaxro I will use it.