One of the players in my group has just changed characters, and is now playing a Ranger with the Double Melee Attack talent. She's taken the Adventurer Feat, meaning that she gets a +2 attack bonus if the second attack is against a different target.
Assuming the first attack doesn't down the original target, how does this work? Can she only choose a different target if she's already engaged with multiple enemies? Can she use a move action to engage a second target - if so, does she need to successfully disengage, or risk opportunity attacks? Can she, within the rules, engage a second target while still engaged with the first?