图1显示了演示应用程序的一个面板，其中包括几种常用组件类型，如输入域、单选按钮、复选框和按钮。
Figure 1 shows one panel of the demonstration application, containing several common component types such as entry fields, radio buttons, check boxes, and buttons.
可以将这些属性看作是内置的标签，可以将它们添加到任何小部件(如字段或复选框)的左上部。
Label property. You can think of these as built-in labels that you can add to the top-left portion of any widget, such as a field or check box.
点击Name字段旁边的复选框，如先前图15中所示(您可能需要点击两次)。
Click the check box next to the Name field, as shown previously in Figure 15 (you may need to click twice).
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