How do i open maps

[ranhcase Initiate]

This is surelly a stupid question, but i'm very new to editing the game, and i don't know how to open custom maps, as i have created one, and i would like to play it.

[Host_6 Special]

It depends on how do you want to play it? As multiplayer, Solo or Quest?

[ranhcase Initiate]

Well, please explain all of them, as i intend to do them all (maybe).

(And so that i won't need to make more topics on this later on)