Directional button - Move cursor, change selected options in menus, Character Creation and navigate Progress screen and Training area.

导航键——移动光标、菜单移动、角色创建、成长及训练栏的导航。

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Based on a method of bi-directional light tracking, it works out the best length of lamp-source and the distribution of lamp on the screen with this lamp-source.

采用射线跟踪法，通过模拟计算得到最优光源的长度和最优长度时，在灯前测试屏上照度分布。

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Around the front is a small LCD screen, four-directional navigation control with central button and two more, marked play and menu.

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It features a 7-inch capacitive screen, 2 shoulder buttons, 4 face buttons and a directional pad.

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Scaling the Apple Maps app to this screen size would be a bit more challenging, as you can see here from the size of the directional text.

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