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.

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。

youdao

With a bit of design work, you can use Viewport Rectangle to create some unique behaviors.

只需一点设计工作，你就可以用视口矩形创造出一些独特的行为。

youdao