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src/components/ruler.vue

@@ -129,6 +129,8 @@ watch(() => props.dotIndex, (newVal, oldVal) => {
   }
   if (props.dotIndex >= 0) {
     getLineData('head', `dot${props.dotIndex + 1}`)
+  } else {
+    zoomScale(props.boxPos.y, 0)
   }
 })
 const getDistanceAndZoom = () => {