To select the Arena you want to play, go to the Arena section. The Arena is loaded by clicking on  OK or Apply. The current game will be ended and a new one started. You can click on the  Defaults button to restore the default Arena.

If you have self-made Clanbomber arenas, you can copy them to ~/.clanbomber/maps, where Granatier will look for them. The default Clanbomber arenas are already shipped with Granatier.

If you select Random Mode, a random arena will be used for each new round. If there are arenas you don't want to play, you can uncheck them.