diff --git a/web/src/components/settings/ComposerToolbarLayoutControl.tsx b/web/src/components/settings/ComposerToolbarLayoutControl.tsx
index dcec68d2..13247779 100644
--- a/web/src/components/settings/ComposerToolbarLayoutControl.tsx
+++ b/web/src/components/settings/ComposerToolbarLayoutControl.tsx
@@ -37,10 +37,10 @@ export function ComposerToolbarLayoutControl() {
 
     const moveDraggedItem = (group: ComposerToolbarGroup, index: number) => {
         if (draggedItem) {
-            const next = layout.mode === 'split'
+            const next = group === 'hidden' || layout.hidden.includes(draggedItem) || layout.mode === 'split'
                 ? moveComposerToolbarItem(layout, draggedItem, group, index)
                 : moveComposerToolbarItemInSingleLayout(layout, draggedItem, index)
-            const unchanged = next.left.join() === layout.left.join() && next.right.join() === layout.right.join()
+            const unchanged = next.left.join() === layout.left.join() && next.right.join() === layout.right.join() && next.hidden.join() === layout.hidden.join()
             if (!unchanged) {
                 setLayout(next)
             }
@@ -51,9 +51,10 @@ export function ComposerToolbarLayoutControl() {
         event.preventDefault()
         const item = draggedItem ?? event.dataTransfer.getData('text/plain')
         if ((COMPOSER_TOOLBAR_ITEM_IDS as readonly string[]).includes(item)) {
-            const next = layout.mode === 'split'
-                ? moveComposerToolbarItem(layout, item as ComposerToolbarItemId, group, index)
-                : moveComposerToolbarItemInSingleLayout(layout, item as ComposerToolbarItemId, index)
+            const typedItem = item as ComposerToolbarItemId
+            const next = group === 'hidden' || layout.hidden.includes(typedItem) || layout.mode === 'split'
+                ? moveComposerToolbarItem(layout, typedItem, group, index)
+                : moveComposerToolbarItemInSingleLayout(layout, typedItem, index)
             setLayout(next)
         }
         setDraggedItem(null)
@@ -61,7 +62,7 @@ export function ComposerToolbarLayoutControl() {
 
     const moveItemByOffset = (item: ComposerToolbarItemId, group: ComposerToolbarGroup, index: number, offset: -1 | 1) => {
         const targetIndex = Math.max(0, index + offset)
-        const next = layout.mode === 'split'
+        const next = group === 'hidden' || layout.mode === 'split'
             ? moveComposerToolbarItem(layout, item, group, targetIndex)
             : moveComposerToolbarItemInSingleLayout(layout, item, targetIndex)
         setLayout(next)
@@ -127,8 +128,10 @@ export function ComposerToolbarLayoutControl() {
 
     const singleAlignment = layout.mode === 'center' ? 'justify-center' : layout.mode === 'right' ? 'justify-end' : 'justify-start'
     const singleItems = [...layout.left, ...layout.right]
-    const selectedGroup: ComposerToolbarGroup = selectedItem && layout.right.includes(selectedItem) ? 'right' : 'left'
-    const selectedItems = layout.mode === 'split' ? layout[selectedGroup] : singleItems
+    const selectedGroup: ComposerToolbarGroup = selectedItem && layout.hidden.includes(selectedItem)
+        ? 'hidden'
+        : selectedItem && layout.right.includes(selectedItem) ? 'right' : 'left'
+    const selectedItems = selectedGroup === 'hidden' ? layout.hidden : layout.mode === 'split' ? layout[selectedGroup] : singleItems
     const selectedIndex = selectedItem ? selectedItems.indexOf(selectedItem) : -1
 
     return (
@@ -173,6 +176,22 @@ export function ComposerToolbarLayoutControl() {
                     <span className="ml-1" title={t('composer.send')}><ComposerSendButtonPreview /></span>
                 </div>
             </div>
+            <div className="mx-3 mt-3">
+                <h4 className="text-sm font-medium text-[var(--app-fg)]">{t('settings.chat.composerToolbar.hidden')}</h4>
+                <div className="mt-2 rounded-xl border border-dashed border-[var(--app-border)] bg-[var(--app-subtle-bg)] px-2 py-1.5">
+                    {layout.hidden.length > 0
+                        ? renderGroup('hidden', layout.hidden, 'justify-start', true)
+                        : (
+                            <div
+                                className="flex min-h-10 items-center justify-center text-xs text-[var(--app-hint)]"
+                                onDragOver={(event) => event.preventDefault()}
+                                onDrop={(event) => onDrop(event, 'hidden', 0)}
+                            >
+                                {t('settings.chat.composerToolbar.emptyHidden')}
+                            </div>
+                        )}
+                </div>
+            </div>
             {selectedItem && selectedIndex >= 0 ? (
                 <div className="mx-3 mt-2 flex items-center justify-between gap-2 rounded-lg bg-[var(--app-subtle-bg)] px-3 py-2 text-sm">
                     <span className="min-w-0 truncate text-[var(--app-hint)]">{t(ITEM_LABEL_KEYS[selectedItem])}</span>
@@ -197,7 +216,28 @@ export function ComposerToolbarLayoutControl() {
                         >
                             →
                         </button>
-                        {layout.mode === 'split' ? (
+                        {selectedGroup !== 'hidden' ? (
+                            <button
+                                type="button"
+                                aria-label={t('settings.chat.composerToolbar.hide')}
+                                title={t('settings.chat.composerToolbar.hide')}
+                                onClick={() => setLayout(moveComposerToolbarItem(layout, selectedItem, 'hidden', layout.hidden.length))}
+                                className="ml-1 rounded-lg px-2.5 py-1.5 text-xs text-[var(--app-link)] hover:bg-[var(--app-bg)]"
+                            >
+                                {t('settings.chat.composerToolbar.hide')}
+                            </button>
+                        ) : (
+                            <button
+                                type="button"
+                                aria-label={t('settings.chat.composerToolbar.show')}
+                                title={t('settings.chat.composerToolbar.show')}
+                                onClick={() => setLayout(moveComposerToolbarItem(layout, selectedItem, 'left', layout.left.length))}
+                                className="ml-1 rounded-lg px-2.5 py-1.5 text-xs text-[var(--app-link)] hover:bg-[var(--app-bg)]"
+                            >
+                                {t('settings.chat.composerToolbar.show')}
+                            </button>
+                        )}
+                        {layout.mode === 'split' && selectedGroup !== 'hidden' ? (
                             <button
                                 type="button"
                                 aria-label={selectedGroup === 'left' ? t('settings.chat.composerToolbar.moveRight') : t('settings.chat.composerToolbar.moveLeft')}
diff --git a/web/src/hooks/useComposerToolbarLayout.test.ts b/web/src/hooks/useComposerToolbarLayout.test.ts
index fa1eedf6..a1f2baa7 100644
--- a/web/src/hooks/useComposerToolbarLayout.test.ts
+++ b/web/src/hooks/useComposerToolbarLayout.test.ts
@@ -1,6 +1,7 @@
 import { beforeEach, describe, expect, it } from 'vitest'
 import {
     DEFAULT_COMPOSER_TOOLBAR_LAYOUT,
+    moveComposerToolbarItem,
     moveComposerToolbarItemInSingleLayout,
     normalizeComposerToolbarLayout,
 } from './useComposerToolbarLayout'
@@ -19,6 +20,7 @@ describe('DEFAULT_COMPOSER_TOOLBAR_LAYOUT', () => {
             'schedule',
             'abort',
         ])
+        expect(DEFAULT_COMPOSER_TOOLBAR_LAYOUT.hidden).toEqual([])
     })
 })
 
@@ -39,7 +41,30 @@ describe('normalizeComposerToolbarLayout', () => {
         expect(result.mode).toBe('split')
         expect(result.left.slice(0, 2)).toEqual(['settings', 'attachment'])
         expect(result.right).toEqual(['abort', 'schedule'])
-        expect([...result.left, ...result.right]).toHaveLength(DEFAULT_COMPOSER_TOOLBAR_LAYOUT.left.length)
+        expect([...result.left, ...result.right, ...result.hidden]).toHaveLength(DEFAULT_COMPOSER_TOOLBAR_LAYOUT.left.length)
+    })
+
+    it('preserves hidden tools and keeps newly introduced tools visible', () => {
+        const result = normalizeComposerToolbarLayout({
+            mode: 'left',
+            left: ['attachment'],
+            right: [],
+            hidden: ['settings', 'abort', 'settings'],
+        })
+
+        expect(result.hidden).toEqual(['settings', 'abort'])
+        expect(result.left).toContain('schedule')
+        expect(result.left).not.toContain('settings')
+    })
+
+    it('moves tools between visible and hidden groups without duplication', () => {
+        const hidden = moveComposerToolbarItem(DEFAULT_COMPOSER_TOOLBAR_LAYOUT, 'terminal', 'hidden', 0)
+        expect(hidden.hidden).toEqual(['terminal'])
+        expect(hidden.left).not.toContain('terminal')
+
+        const visible = moveComposerToolbarItem(hidden, 'terminal', 'right', 0)
+        expect(visible.hidden).toEqual([])
+        expect(visible.right).toEqual(['terminal'])
     })
 
     it('reorders across a hidden split boundary in single-column modes', () => {
diff --git a/web/src/hooks/useComposerToolbarLayout.ts b/web/src/hooks/useComposerToolbarLayout.ts
index ac7ea082..d4782c30 100644
--- a/web/src/hooks/useComposerToolbarLayout.ts
+++ b/web/src/hooks/useComposerToolbarLayout.ts
@@ -15,12 +15,13 @@ export const COMPOSER_TOOLBAR_ITEM_IDS = [
 
 export type ComposerToolbarItemId = typeof COMPOSER_TOOLBAR_ITEM_IDS[number]
 export type ComposerToolbarLayoutMode = 'left' | 'center' | 'right' | 'split'
-export type ComposerToolbarGroup = 'left' | 'right'
+export type ComposerToolbarGroup = 'left' | 'right' | 'hidden'
 
 export type ComposerToolbarLayout = {
     mode: ComposerToolbarLayoutMode
     left: ComposerToolbarItemId[]
     right: ComposerToolbarItemId[]
+    hidden: ComposerToolbarItemId[]
 }
 
 export const DEFAULT_COMPOSER_TOOLBAR_LAYOUT: ComposerToolbarLayout = {
@@ -30,6 +31,7 @@ export const DEFAULT_COMPOSER_TOOLBAR_LAYOUT: ComposerToolbarLayout = {
         'abort',
     ],
     right: [],
+    hidden: [],
 }
 
 export function moveComposerToolbarItem(
@@ -40,9 +42,10 @@ export function moveComposerToolbarItem(
 ): ComposerToolbarLayout {
     const left = layout.left.filter((entry) => entry !== item)
     const right = layout.right.filter((entry) => entry !== item)
-    const target = targetGroup === 'left' ? left : right
+    const hidden = layout.hidden.filter((entry) => entry !== item)
+    const target = targetGroup === 'left' ? left : targetGroup === 'right' ? right : hidden
     target.splice(Math.max(0, Math.min(targetIndex, target.length)), 0, item)
-    return { ...layout, left, right }
+    return { ...layout, left, right, hidden }
 }
 
 export function moveComposerToolbarItemInSingleLayout(
@@ -52,11 +55,13 @@ export function moveComposerToolbarItemInSingleLayout(
 ): ComposerToolbarLayout {
     const leftCount = layout.left.length
     const items = [...layout.left, ...layout.right].filter((entry) => entry !== item)
+    const hidden = layout.hidden.filter((entry) => entry !== item)
     items.splice(Math.max(0, Math.min(targetIndex, items.length)), 0, item)
     return {
         ...layout,
         left: items.slice(0, leftCount),
         right: items.slice(leftCount),
+        hidden,
     }
 }
 
@@ -93,6 +98,7 @@ export function normalizeComposerToolbarLayout(value: unknown): ComposerToolbarL
 
     const left = normalizeGroup(candidate.left)
     const right = normalizeGroup(candidate.right)
+    const hidden = normalizeGroup(candidate.hidden)
     for (const item of COMPOSER_TOOLBAR_ITEM_IDS) {
         if (!seen.has(item)) {
             left.push(item)
@@ -103,6 +109,7 @@ export function normalizeComposerToolbarLayout(value: unknown): ComposerToolbarL
         mode: isLayoutMode(candidate.mode) ? candidate.mode : DEFAULT_COMPOSER_TOOLBAR_LAYOUT.mode,
         left,
         right,
+        hidden,
     }
 }
 
diff --git a/web/src/lib/locales/en.ts b/web/src/lib/locales/en.ts
index 63afa0f2..f6d29c17 100644
--- a/web/src/lib/locales/en.ts
+++ b/web/src/lib/locales/en.ts
@@ -725,12 +725,16 @@ export default {
   'settings.chat.composerToolbar.description': 'Choose how toolbar actions are arranged below the message input.',
   'settings.chat.composerToolbar.layout': 'Alignment',
   'settings.chat.composerToolbar.order': 'Tool order',
+  'settings.chat.composerToolbar.hidden': 'Hidden tools',
+  'settings.chat.composerToolbar.emptyHidden': 'Drag tools here to hide them',
+  'settings.chat.composerToolbar.hide': 'Hide',
+  'settings.chat.composerToolbar.show': 'Show',
   'settings.chat.composerToolbar.layout.left': 'Left',
   'settings.chat.composerToolbar.layout.center': 'Center',
   'settings.chat.composerToolbar.layout.right': 'Right',
   'settings.chat.composerToolbar.layout.split': 'Split',
   'settings.chat.composerToolbar.dragHint': 'Drag actions to reorder them. In split layout, drag between the two groups.',
-  'settings.chat.composerToolbar.previewHint': 'Drag the actual toolbar icons below. Changes are reflected in this preview immediately; hover an icon to see its action.',
+  'settings.chat.composerToolbar.previewHint': 'Drag the actual toolbar icons below to reorder them, or drag them to Hidden tools. Changes appear immediately; hover an icon to see its action.',
   'settings.chat.composerToolbar.reset': 'Reset',
   'settings.chat.composerToolbar.leftGroup': 'Left group',
   'settings.chat.composerToolbar.rightGroup': 'Right group',
diff --git a/web/src/lib/locales/zh-CN.ts b/web/src/lib/locales/zh-CN.ts
index a3f1aa08..08ceb158 100644
--- a/web/src/lib/locales/zh-CN.ts
+++ b/web/src/lib/locales/zh-CN.ts
@@ -729,12 +729,16 @@ export default {
   'settings.chat.composerToolbar.description': '设置消息输入框底部工具的排列方式。',
   'settings.chat.composerToolbar.layout': '对齐方式',
   'settings.chat.composerToolbar.order': '工具顺序',
+  'settings.chat.composerToolbar.hidden': '隐藏工具',
+  'settings.chat.composerToolbar.emptyHidden': '将工具拖到这里隐藏',
+  'settings.chat.composerToolbar.hide': '隐藏',
+  'settings.chat.composerToolbar.show': '显示',
   'settings.chat.composerToolbar.layout.left': '左对齐',
   'settings.chat.composerToolbar.layout.center': '居中',
   'settings.chat.composerToolbar.layout.right': '右对齐',
   'settings.chat.composerToolbar.layout.split': '左右分组',
   'settings.chat.composerToolbar.dragHint': '拖动操作项可调整顺序；左右分组布局下也可在两组之间拖动。',
-  'settings.chat.composerToolbar.previewHint': '直接拖动下方的实际工具图标，预览会立即更新；鼠标悬停可查看功能名称。',
+  'settings.chat.composerToolbar.previewHint': '直接拖动下方的实际工具图标调整顺序，或拖到隐藏工具；预览会立即更新，鼠标悬停可查看功能名称。',
   'settings.chat.composerToolbar.reset': '恢复默认',
   'settings.chat.composerToolbar.leftGroup': '左侧分组',
   'settings.chat.composerToolbar.rightGroup': '右侧分组',