diff --git a/src/Editor/DbClick/DBClickPolyline.ts b/src/Editor/DbClick/DBClickPolyline.ts
index 4163d1702..874ddbf41 100644
--- a/src/Editor/DbClick/DBClickPolyline.ts
+++ b/src/Editor/DbClick/DBClickPolyline.ts
@@ -304,6 +304,8 @@ export class DBClickPolyline extends Singleton
         if (indexList.length === 2)
             pl.RemoveVertexIn(indexList[0], indexList[1]);
     }
+
+    //Break(打断) Or S(拉直)
     private ExecSAndBCommand(indexList: number[], vertex: IVertex, editorCommand: string)
     {
         if (!equaln(indexList[0], vertex.index))
@@ -314,7 +316,7 @@ export class DBClickPolyline extends Singleton
             //执行打断操作
             this.Break(indexList);
         }
-        else
+        else//"S"
         {
             //执行拉直操作
             this.StretchStraight(indexList);