No real point for a screenshot, but it works like this: After choosing a faction you can also choose a commander doctrine, these then open a tree of special commander skills (while playing to earn special points that allow to to select additional skills to become available, i.e. each time choose one out of three skills). Typical stuff would be to call in a special air-strike, or reinforcements from off screen, or call to arms motivation boost of your troops etc.Then the skill has a cooldown and can only be used again after some minutes.