Konashi

Hello, Everyone know that the quests are displayed above the npc's head with icons blue, yellow and light blue but I have a problem with that. Light blue icons aren't visible even when I don't exceed the level cap. In summary I have no light blue quests that are displayed above their head except when I talk to the npc and I would like to know if there is a way to redisplay them. Can you help me please? Thank you!