测试按钮，了解按钮各种机械动作。在设计中尤为重要的一部分，新手尝试右键按钮，出现下拉选项中机械动作，可从中选择按钮的机械动作。修改触发机制，可以使按钮实现不同的用处。(Test the button to understand the various mechanical actions of the button. In the design is particularly important part of the novice try right button, appear drop-d