diff --git a/containers/novela/static/editor.js b/containers/novela/static/editor.js
index c532963..9e4d61c 100644
--- a/containers/novela/static/editor.js
+++ b/containers/novela/static/editor.js
@@ -817,12 +817,6 @@ function vCmd(name) {
   visualEditor.chain().focus()[name]().run();
   updateVisualButtons();
 }
-function vHeading(level) {
-  if (mode !== 'visual' || !visualEditor) return;
-  visualEditor.chain().focus().toggleHeading({ level }).run();
-  updateVisualButtons();
-}
-
 function updateVisualButtons() {
   if (mode !== 'visual' || !visualEditor) return;
   const set = (id, active) => {
@@ -832,8 +826,8 @@ function updateVisualButtons() {
   set('vb-bold', visualEditor.isActive('bold'));
   set('vb-italic', visualEditor.isActive('italic'));
   set('vb-underline', visualEditor.isActive('underline'));
-  set('vb-h2', visualEditor.isActive('heading', { level: 2 }));
-  set('vb-h3', visualEditor.isActive('heading', { level: 3 }));
+  set('vb-sup', visualEditor.isActive('superscript'));
+  set('vb-sub', visualEditor.isActive('subscript'));
   set('vb-ul', visualEditor.isActive('bulletList'));
   set('vb-ol', visualEditor.isActive('orderedList'));
   set('btn-subheading', visualEditor.isActive('subheading'));
diff --git a/containers/novela/templates/editor.html b/containers/novela/templates/editor.html
index 704fe83..aae2924 100644
--- a/containers/novela/templates/editor.html
+++ b/containers/novela/templates/editor.html
@@ -56,8 +56,8 @@
       <button class="vbtn" id="vb-bold" onclick="vCmd('toggleBold')" title="Bold"><b>B</b></button>
       <button class="vbtn" id="vb-italic" onclick="vCmd('toggleItalic')" title="Italic"><i>I</i></button>
       <button class="vbtn" id="vb-underline" onclick="vCmd('toggleUnderline')" title="Underline"><u>U</u></button>
-      <button class="vbtn" id="vb-h2" onclick="vHeading(2)" title="Heading 2">H2</button>
-      <button class="vbtn" id="vb-h3" onclick="vHeading(3)" title="Heading 3">H3</button>
+      <button class="vbtn" id="vb-sup" onclick="vCmd('toggleSuperscript')" title="Superscript">x²</button>
+      <button class="vbtn" id="vb-sub" onclick="vCmd('toggleSubscript')" title="Subscript">x₂</button>
       <button class="vbtn" id="vb-ul" onclick="vCmd('toggleBulletList')" title="Bullet list">•</button>
       <button class="vbtn" id="vb-ol" onclick="vCmd('toggleOrderedList')" title="Numbered list">1.</button>
     </span>
diff --git a/containers/novela/version.py b/containers/novela/version.py
index ce888a5..abee128 100644
--- a/containers/novela/version.py
+++ b/containers/novela/version.py
@@ -10,7 +10,7 @@ from __future__ import annotations
 
 from changelog import CHANGELOG
 
-BUILD = 4
+BUILD = 5
 
 
 def _release_version() -> str:
diff --git a/docs/changelog-develop.md b/docs/changelog-develop.md
index c8b4c4a..364daf5 100644
--- a/docs/changelog-develop.md
+++ b/docs/changelog-develop.md
@@ -1,5 +1,10 @@
 # Develop Changelog
 
+## 2026-06-13 — Visual editor: drop H2/H3 buttons, add superscript/subscript
+
+### Changed
+- Replaced the H2 and H3 heading buttons in the visual (WYSIWYG) toolbar with **superscript (x²)** and **subscript (x₂)** buttons. The heading buttons weren't part of the novela-ng editor and aren't used; superscript/subscript were missing. Heading levels remain in the schema so existing headings in other books still round-trip — only the authoring buttons changed. `templates/editor.html` (toolbar buttons), `static/editor.js` (`updateVisualButtons` active-state, removed unused `vHeading`). No bundle rebuild (sup/sub extensions were already bundled).
+
 ## 2026-06-12 — Visual editor: full-width editing column
 
 ### Changed