diff --git a/__tests__/snapshot/idraw/examples/test/api.html.jpg b/__tests__/snapshot/idraw/examples/test/api.html.jpg
index 3f640db..7a18841 100644
Binary files a/__tests__/snapshot/idraw/examples/test/api.html.jpg and b/__tests__/snapshot/idraw/examples/test/api.html.jpg differ
diff --git a/packages/board/src/index.ts b/packages/board/src/index.ts
index 08f472b..08f5874 100644
--- a/packages/board/src/index.ts
+++ b/packages/board/src/index.ts
@@ -60,7 +60,7 @@ class Board {
   }
 
   getOriginContext(): CanvasRenderingContext2D {
-    return this[_displayCtx];
+    return this[_originCtx];
   }
 
   getContext(): Context {
diff --git a/packages/idraw/examples/test/api.html b/packages/idraw/examples/test/api.html
index 6705c1d..e7eb1f9 100644
--- a/packages/idraw/examples/test/api.html
+++ b/packages/idraw/examples/test/api.html
@@ -44,7 +44,7 @@
 
     <div class="list">
       <div class="box" id="mount-1">
-        <div class="title">setData</div>
+        <div class="title">setData and scale(2)</div>
       </div>
       <div class="box" id="mount-2">
         <div class="title">exportDataURL('image/png')</div>
@@ -138,7 +138,7 @@
         const mount = document.querySelector('#mount-1');
         const idraw = new iDraw(mount, opts, config);
         idraw.setData(testData);
-
+        idraw.scale(2)
         setTimeout(() => {
           const pngSrc = idraw.exportDataURL('image/png');
           const mount2 = document.querySelector('#mount-2');