diff --git a/frontend/src/lib/components/HandwriteCanvas.svelte b/frontend/src/lib/components/HandwriteCanvas.svelte
index 0698719..72dc9e9 100644
--- a/frontend/src/lib/components/HandwriteCanvas.svelte
+++ b/frontend/src/lib/components/HandwriteCanvas.svelte
@@ -181,10 +181,9 @@
   }
 
   function isPenLike(e: PointerEvent): boolean {
-    // pen / mouse / touch 모두 stroke 허용. iPad Apple Pencil 이 'pen' 으로 안 들어오는
-    // 케이스 보고됨 (브라우저/OS 버전에 따라). 우선 입력 가능성을 넓히고, palm rejection 은
-    // Phase 2 에서 동시 다중 pointer 거부 등 다른 방식으로 처리.
-    return e.pointerType === 'pen' || e.pointerType === 'mouse' || e.pointerType === 'touch';
+    // 사용자 요청: Apple Pencil ('pen') 만 인식. 손가락 ('touch') 거부 — palm rejection.
+    // 데스크톱 테스트용 'mouse' 는 허용.
+    return e.pointerType === 'pen' || e.pointerType === 'mouse';
   }
 
   // ── 지우개 hit-test ──
@@ -412,9 +411,9 @@
   });
 </script>
 
-<div class="flex flex-col h-full">
-  <!-- 툴바 -->
-  <div class="flex items-center gap-1 px-2 py-1 border-b border-default bg-surface shrink-0">
+<div class="flex flex-col h-full" style="touch-action: manipulation;">
+  <!-- 툴바 — touch-action: manipulation 으로 더블탭 줌 차단 -->
+  <div class="flex items-center gap-1 px-2 py-1 border-b border-default bg-surface shrink-0" style="touch-action: manipulation;">
     <!-- Pen / Eraser 모드 토글 -->
     <button
       type="button"
diff --git a/frontend/src/routes/study/write/[id]/+page.svelte b/frontend/src/routes/study/write/[id]/+page.svelte
index 119f4c1..f4fe4c1 100644
--- a/frontend/src/routes/study/write/[id]/+page.svelte
+++ b/frontend/src/routes/study/write/[id]/+page.svelte
@@ -108,7 +108,7 @@
   }
 </script>
 
-<div class="h-full flex flex-col relative">
+<div class="h-full flex flex-col relative" style="touch-action: manipulation;">
   <!-- 상단 헤더 -->
   <div class="flex items-center justify-between gap-2 px-3 py-2 border-b border-default bg-surface shrink-0 z-10">
     <Button href="/study/write" size="sm" variant="ghost" icon={ArrowLeft}>목록</Button>