diff --git a/frontend/src/components/canvas/CanvasStage.vue b/frontend/src/components/canvas/CanvasStage.vue
index 056386f..25d00b7 100644
--- a/frontend/src/components/canvas/CanvasStage.vue
+++ b/frontend/src/components/canvas/CanvasStage.vue
@@ -216,6 +216,7 @@ function onPointerDown(e) {
   // 2) 点击连线:切换选中(不再落入平移)
   const edgeHit = e.target.closest?.('.cv-edge-hit')
   if (edgeHit && e.button === 0) {
+    linkSource.value = null
     const id = edgeHit.dataset.edgeId
     const s = new Set(edgeSel.value)
     if (s.has(id)) s.delete(id)
@@ -226,7 +227,7 @@ function onPointerDown(e) {
   }
 
   const node = hitNode(e)
-  if (!node) linkSource.value = null
+  if (!node || node.id === linkSource.value?.id) linkSource.value = null
   const p = localXY(e)
 
   const wantPan =
@@ -355,7 +356,7 @@ function onPortClick(id, side) {
     return
   }
   if (linkSource.value.id === id) {
-    linkSource.value = linkSource.value.side === side ? null : { id, side }
+    linkSource.value = null
     return
   }
   emit('link-create', {
@@ -570,7 +571,7 @@ defineExpose({
     </div>
 
     <div v-if="marquee" class="cv-marquee" :style="marquee" />
-    <div class="cv-hint">拖拽空白平移 · Ctrl+滚轮缩放 · 依次点击两个节点的连接点连线（Esc 取消） · 双击笔记编辑</div>
+    <div class="cv-hint">拖拽空白平移 · Ctrl+滚轮缩放 · 依次点击两个连接点连线（再点起点/空白/Esc 取消） · 双击笔记编辑</div>
   </div>
 </template>
 
diff --git a/frontend/src/views/CanvasView.vue b/frontend/src/views/CanvasView.vue
index 7bddf62..ff8728f 100644
--- a/frontend/src/views/CanvasView.vue
+++ b/frontend/src/views/CanvasView.vue
@@ -857,8 +857,8 @@ const saveLabel = computed(() => ({
         <div v-if="genMsg" class="cv-genmsg">{{ genMsg }}</div>
 
         <div class="cv-tips">
-          双击空白建笔记 · 依次点击两个连接点连线 · 选中后右下角缩放 · Ctrl+D 复制 ·
-          本地图片直接拖入或 Ctrl+V 粘贴 · 按 1 适应全部内容
+          双击空白建笔记 · 依次点击两个连接点连线,再点起点/空白/Esc 取消 ·
+          选中后右下角缩放 · Ctrl+D 复制 · 本地图片直接拖入或 Ctrl+V 粘贴 · 按 1 适应全部内容
         </div>
       </aside>
     </div>