diff --git a/src/components/common/DragLine.vue b/src/components/common/DragLine.vue
index 583a402..01563dc 100644
--- a/src/components/common/DragLine.vue
+++ b/src/components/common/DragLine.vue
@@ -77,6 +77,7 @@ onUnmounted(() => {
 .drag-line {
   position: absolute;
   cursor: col-resize;
+  transition: all 0.3s;
 
   &:hover,
   &.drag_resizing {