Please help me!!

I have a question what program do I need to change the map and players must not download an entire map .

Change the map via the console
They have to download the map if they don’t have it

I don’t undestand what i need to doo.

Open up the console in the game and type map <mapnamehere>
Without the <>.

For a person to play on the map, they have to download it.