Hi, I just recently updated my Samsung Galaxy s5 from 4.4.2 to 5.1.1, and I'm loving all the new features. However, I wanted to see if anyone can tell me about the dropdown notifications that appear at the top of your screen. So far, I've only seen this happen for Twitter notifications, but I wish it happened with everything. Does this only work with certain apps? Is there a list of these apps? Is it some setting I'm missing? Please help.