Command cards: making the new trainable options visible in the gameįirst of all, if you try to edit an existing melee game, you will see that those units aren't there. Abilities: editing the Train ability of a buildingģ. First, you need to edit the unit's Train ability, and second, you need to update its command card with the changes.Ģ. You can't just do that to a regular melee map. In StarCraft2 it is all more complicated.