The most obvious way to create a control is to select a control from the editor's design palette (see Figure 6) and then drop it onto the canvas.
创建控件最直接的方式就是从编辑器的设计选项板(如图6所示)中选择一个控件并拖放到画布上。
An even easier way to create a control is to select a node in your instance data and drag it onto an empty area in the design canvas.
创建控件更简单的办法是从实例数据中选择节点，拖放到设计画布的空白区域。
One of the most basic control types is Canvas, which is used to either create custom controls or to draw pictures.
Canvas是最基本的控件类型之一，可以用它来创建定制控件或绘图。
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