diff --git a/src/components/islands/EventEditor.tsx b/src/components/islands/EventEditor.tsx
index bf1a527..2e6b807 100644
--- a/src/components/islands/EventEditor.tsx
+++ b/src/components/islands/EventEditor.tsx
@@ -1,4 +1,4 @@
-import { useRef, useState } from 'react';
+import { useEffect, useRef, useState } from 'react';
 import type { FormEvent, ChangeEvent } from 'react';
 import { createBrowserSupabase } from '../../lib/supabase';
 import {
@@ -16,6 +16,8 @@ import {
   ListsToggle,
   BlockTypeSelect,
   InsertImage,
+  Separator,
+  ButtonWithTooltip,
 } from '@mdxeditor/editor';
 import '@mdxeditor/editor/style.css';
 import type { Dict } from '../../lib/i18n';
@@ -71,34 +73,103 @@ async function imageUploadHandler(file: File): Promise<string> {
   }
 }
 
-function ContentEditor({ content, onChange }: ContentEditorProps) {
+function ExpandIcon() {
   return (
-    <MDXEditor
-      markdown={content}
-      onChange={onChange}
-      plugins={[
-        headingsPlugin(),
-        listsPlugin(),
-        linkPlugin(),
-        imagePlugin({ imageUploadHandler: imageUploadHandler }),
-        quotePlugin(),
-        thematicBreakPlugin(),
-        markdownShortcutPlugin(),
-        toolbarPlugin({
-          toolbarContents: () => (
-            <>
-              <UndoRedo />
-              <BoldItalicUnderlineToggles />
-              <BlockTypeSelect />
-              <ListsToggle />
-              
-              <InsertImage />
-            </>
-          ),
-        }),
-      ]}
-      contentEditableClassName="prose prose-sm max-w-none textarea"
-    />
+    <svg
+      width="24"
+      height="24"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      strokeWidth="2"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      aria-hidden="true"
+    >
+      <path d="M8 3H5a2 2 0 0 0-2 2v3" />
+      <path d="M16 3h3a2 2 0 0 1 2 2v3" />
+      <path d="M8 21H5a2 2 0 0 1-2-2v-3" />
+      <path d="M16 21h3a2 2 0 0 0 2-2v-3" />
+    </svg>
+  );
+}
+
+function CollapseIcon() {
+  return (
+    <svg
+      width="24"
+      height="24"
+      viewBox="0 0 24 24"
+      fill="none"
+      stroke="currentColor"
+      strokeWidth="2"
+      strokeLinecap="round"
+      strokeLinejoin="round"
+      aria-hidden="true"
+    >
+      <path d="M3 8h3a2 2 0 0 0 2-2V3" />
+      <path d="M21 8h-3a2 2 0 0 1-2-2V3" />
+      <path d="M3 16h3a2 2 0 0 1 2 2v3" />
+      <path d="M21 16h-3a2 2 0 0 0-2 2v3" />
+    </svg>
+  );
+}
+
+function ContentEditor({ content, onChange }: ContentEditorProps) {
+  const [expanded, setExpanded] = useState(false);
+
+  useEffect(() => {
+    if (!expanded) return;
+    const previousOverflow = document.body.style.overflow;
+    document.body.style.overflow = 'hidden';
+    function handleKeyDown(e: KeyboardEvent) {
+      if (e.key === 'Escape') setExpanded(false);
+    }
+    document.addEventListener('keydown', handleKeyDown);
+    return () => {
+      document.body.style.overflow = previousOverflow;
+      document.removeEventListener('keydown', handleKeyDown);
+    };
+  }, [expanded]);
+
+  return (
+    <div className={expanded ? 'content-editor content-editor--expanded' : 'content-editor'}>
+      <MDXEditor
+        className={expanded ? 'mdxeditor-full-height' : undefined}
+        markdown={content}
+        onChange={onChange}
+        plugins={[
+          headingsPlugin(),
+          listsPlugin(),
+          linkPlugin(),
+          imagePlugin({ imageUploadHandler: imageUploadHandler }),
+          quotePlugin(),
+          thematicBreakPlugin(),
+          markdownShortcutPlugin(),
+          toolbarPlugin({
+            toolbarContents: () => (
+              <>
+                <UndoRedo />
+                <BoldItalicUnderlineToggles />
+                <BlockTypeSelect />
+                <ListsToggle />
+                <Separator />
+                <InsertImage />
+                <Separator />
+                <ButtonWithTooltip
+                  type="button"
+                  title={expanded ? 'Collapse' : 'Expand'}
+                  onClick={() => setExpanded((v) => !v)}
+                >
+                  {expanded ? <CollapseIcon /> : <ExpandIcon />}
+                </ButtonWithTooltip>
+              </>
+            ),
+          }),
+        ]}
+        contentEditableClassName="prose prose-sm max-w-none textarea"
+      />
+    </div>
   );
 }
 export default function EventEditor({ dict: t, event }: Props) {
diff --git a/src/styles/_forms.scss b/src/styles/_forms.scss
index 6c4183b..a51284d 100644
--- a/src/styles/_forms.scss
+++ b/src/styles/_forms.scss
@@ -45,6 +45,21 @@
   resize: vertical;
 }
 
+.content-editor--expanded {
+  position: fixed;
+  inset: 0;
+  z-index: 1000;
+  background: var(--surface);
+  padding: var(--space-4);
+  display: flex;
+  flex-direction: column;
+
+  .mdxeditor {
+    flex: 1;
+    min-height: 0;
+  }
+}
+
 .form-error {
   background: var(--danger-soft);
   color: var(--danger);