Aside from the "Apps" icon, there only seems to be three app icons on the bottom of the Home screen in all the videos I watch. Is it possible to have more, or is three the limit? Can the Apps icon be removed and replaced with something else, or is it permanent? Also, another difference I've seen (I'm used to the Sense UI) is that a lot of the bottom of the screen (the app icons, the dots for the different panels) seems to take up a lot of space, so that only the upper half of the screen is scrollable. There still seems to be the same amount of space in this area (four rows to customize), but it seems like a lot of space is being unused at the bottom. Is it possible to change any of this, or is that just how much space you have to work with? Thanks.