您已经看到了如何使用主菜单和工具栏创建活动及其他结构元素，还看到了如何使用Outline视图定义额外的元素。

You have seen how to create activities and other structural elements using the main menus and toolbar, and how to define additional elements using the Outline view.

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主程序窗口由顶部的列表窗口，在底部的状态栏，在左侧边栏，可用文件夹列表，工具栏和主菜单。

The main program window consists of List Window, Status Bar at the bottom, Side Bar at the left, List of available folders, Tool Bar and Main Menu on the top.

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