单击检查器窗口顶部的Profile选项卡，点击底部左侧的圆形记录图标来启动分析。
Click on the Profile TAB at the top of the inspector window and click the circle record icon in the bottom left to start profiling.
为了方便编写内容，点击Main Description左侧的富文本编辑器图标。
To facilitate authoring this content, click on the rich text editor icon to the left of the Main Description.
通过点击并拖动左侧的图标来拖动出一个新的屏幕(screen)。
Drag out a new screen by pressing the mouse on the icon to the left and dragging away.
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