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比较标签一般用来显示仪表盘、KPI 组件中指标的实际值与对比值之间的变化情况。
文中以KPI组件为例介绍变化标签样式中各个设置项的含义。
显示标签设置为否时，将不显示变化标签。
设置是否显示三角符号。当实际值大于对比值时显示正三角符号，小于则显示倒三角符号。
设置是否显示百分率。
选择百分率的计算模式，可选比率或增量。
选择“比率”时，显示实际值与目标值的比值百分比；
选择“增量”时，显示实际值与目标值的差值占目标值的百分比。
设置数据标签的字体样式，如字体、大小、颜色、粗体以及斜体。
其中字体大小以系统的默认字体大小为基准，可设置为全局设置中内容字体大小的 0.5~8 倍或者选择 Auto。
KPI 组件特有属性。
设置变化标签的背景色，默认为无背景色，也可以设置为变化标签背景色。
设置为变化标签背景色是指变化标签的背景色使用变化标签字体的颜色，而字体颜色则使用白色。当数据发生变化时，变化标签的背景颜色也会根据设定的区间颜色发生变化。
下图为设置为“变化标签背景色”效果。
