黄色的矩形表示字符数据。

Yellow rectangles represent character data.

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使用ImageMap工具，将标识符分配给图像中的各个像素相当简单，只需在相应的区域中指定矩形并在弹出的输入框中输入一个惟一的字符串。

With the ImageMap tool, assigning identifiers to individual pixels in the image is as easy as specifying a rectangle in the appropriate area and entering a unique string in the input box that pops up.

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这个函数为系统插字符创建一个灰色的矩形，并声明对插字符的所有权。插字符的形状可以是线条，也可以是方块。

Creates a gray rectangle for the system caret and claims ownership of the caret. The caret shape can be a line or a block.

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