799677446 commented on issue #9128: 键盘缩放事件 URL: https://github.com/apache/incubator-echarts/issues/9128#issuecomment-424642128  你好，现有需求是以鼠标移动的指标为中心点，点击方向键以这个中心点放大或者缩小，主要是麻烦在这一点上，想请教下有什么好思路解决
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