河流图当tooiltip设置为“axis”时,鼠标移动到图上时高亮显示,怎么找当前高亮显示的是哪一个legend图例?
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Description
### What problem does this feature solve?
由于legend图例过多时,客户发现从颜色找是哪一个时,过于麻烦,需要找好一会,现在想当鼠标移动到图上时,遍历显示的tooiltip信息也很多,想确定当前高亮的图例的名字很难,现在想在tooiltip上做点文章,放大字体或者标志颜色来方便告知客户。
### What does the proposed API look like?
我希望大佬解答我的问题
echarts版本: 4.9.0
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