Advanced principles of Human computer interaction

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The front of the iPod is completely flat and smooth and the color can vary according to user preferences. Just below half of the front is taken up with the transparent screen through which you view the display for the interface.


This matte area is marginally raised from the surface for a functional reason. On the matte area, on the four points of the compass are four playback buttons. At the north point is a "MENU" button that allows you to navigate through the menus. At the west point is a step back button. At the south point is a play / pause button. At the east point is a step forward button.The MENU button takes you from the normal screen to a menu screen that allows you to navigate to different capabilities including "Music", "Photos" and "Videos" options on the menu. You can then enter each of these menus and navigate through them and if you want to go back up to the previous level of the menu then you can just press the MENU button again. This allows you to move back through the menu systems if you have made a mistake during your navigation. Each time that you press it will take you to the next level up in the menu system until you reappear at the original screen that you started from. ...
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