diff --git a/design/change-note-type.pen b/design/change-note-type.pen
new file mode 100644
index 00000000..649cb778
--- /dev/null
+++ b/design/change-note-type.pen
@@ -0,0 +1 @@
+{"children":[{"type":"frame","id":"typePicker1","x":0,"y":0,"name":"Type Picker — Dropdown Open","clip":true,"width":280,"height":300,"fill":"#ffffff","layout":"vertical","padding":[16,16],"gap":12,"children":[{"type":"text","id":"heading1","text":"Properties Panel — Type Selector","fontSize":14,"fontWeight":600,"fill":"#1a1a1a"},{"type":"frame","id":"typeRow1","name":"Type Row","width":"fill_container","height":32,"alignItems":"center","justifyContent":"space-between","children":[{"type":"text","id":"typeLabel1","text":"TYPE","fontSize":10,"fontWeight":600,"letterSpacing":1.2,"fill":"#8b8b8b","fontFamily":"IBM Plex Mono"},{"type":"frame","id":"typeTrigger1","name":"Select Trigger","height":26,"padding":[2,8],"gap":4,"alignItems":"center","fill":"#e8f0fe","cornerRadius":6,"children":[{"type":"text","id":"typeValue1","text":"Note","fontSize":12,"fontWeight":500,"fill":"#4285f4"},{"type":"text","id":"chevron1","text":"▾","fontSize":10,"fill":"#4285f4"}]}]},{"type":"frame","id":"dropdown1","name":"Dropdown Menu (Open)","width":160,"fill":"#ffffff","cornerRadius":8,"padding":[4,4],"gap":2,"stroke":{"align":"outside","thickness":1,"fill":"#e0e0e0"},"children":[{"type":"frame","id":"optNone","name":"Option: None","width":"fill_container","height":28,"padding":[0,8],"alignItems":"center","cornerRadius":4,"children":[{"type":"text","id":"optNoneText","text":"None","fontSize":13,"fill":"#8b8b8b"}]},{"type":"frame","id":"separator1","name":"Separator","width":"fill_container","height":1,"fill":"#e0e0e0"},{"type":"frame","id":"optProject","name":"Option: Project","width":"fill_container","height":28,"padding":[0,8],"alignItems":"center","cornerRadius":4,"children":[{"type":"text","id":"optProjectText","text":"Project","fontSize":13,"fill":"#1a1a1a"}]},{"type":"frame","id":"optPerson","name":"Option: Person","width":"fill_container","height":28,"padding":[0,8],"alignItems":"center","cornerRadius":4,"fill":"#f0f0f0","children":[{"type":"text","id":"optPersonText","text":"Person","fontSize":13,"fill":"#1a1a1a"}]},{"type":"frame","id":"optTopic","name":"Option: Topic","width":"fill_container","height":28,"padding":[0,8],"alignItems":"center","cornerRadius":4,"children":[{"type":"text","id":"optTopicText","text":"Topic","fontSize":13,"fill":"#1a1a1a"}]},{"type":"frame","id":"optExperiment","name":"Option: Experiment","width":"fill_container","height":28,"padding":[0,8],"alignItems":"center","cornerRadius":4,"children":[{"type":"text","id":"optExpText","text":"Experiment","fontSize":13,"fill":"#1a1a1a"}]}]}]}],"variables":{}}
\ No newline at end of file
diff --git a/src/components/DynamicPropertiesPanel.test.tsx b/src/components/DynamicPropertiesPanel.test.tsx
index 284d8e2b..8adbd225 100644
--- a/src/components/DynamicPropertiesPanel.test.tsx
+++ b/src/components/DynamicPropertiesPanel.test.tsx
@@ -1,8 +1,17 @@
-import { describe, it, expect, vi, beforeEach } from 'vitest'
+import { describe, it, expect, vi, beforeEach, beforeAll } from 'vitest'
 import { render, screen, fireEvent } from '@testing-library/react'
 import { DynamicPropertiesPanel, containsWikilinks } from './DynamicPropertiesPanel'
 import type { VaultEntry } from '../types'
 
+// Radix Select needs ResizeObserver and pointer/scroll APIs in JSDOM
+beforeAll(() => {
+  global.ResizeObserver = class { observe() {} unobserve() {} disconnect() {} }
+  Element.prototype.scrollIntoView = vi.fn()
+  Element.prototype.hasPointerCapture = () => false
+  Element.prototype.setPointerCapture = vi.fn()
+  Element.prototype.releasePointerCapture = vi.fn()
+})
+
 const makeEntry = (overrides: Partial<VaultEntry> = {}): VaultEntry => ({
   path: '/vault/note/test.md',
   filename: 'test.md',
@@ -218,7 +227,7 @@ describe('DynamicPropertiesPanel', () => {
     expect(onAddProperty).toHaveBeenCalledWith('priority', 'high')
   })
 
-  it('handles navigating to type via click', () => {
+  it('handles navigating to type via click in read-only mode', () => {
     render(
       <DynamicPropertiesPanel
         entry={makeEntry({ isA: 'Project' })}
@@ -231,6 +240,88 @@ describe('DynamicPropertiesPanel', () => {
     expect(onNavigate).toHaveBeenCalledWith('type/project')
   })
 
+  describe('TypeSelector', () => {
+    const typeEntries = [
+      makeEntry({ path: '/vault/type/project.md', title: 'Project', isA: 'Type' }),
+      makeEntry({ path: '/vault/type/person.md', title: 'Person', isA: 'Type' }),
+      makeEntry({ path: '/vault/type/topic.md', title: 'Topic', isA: 'Type' }),
+    ]
+
+    it('renders as dropdown when editable', () => {
+      render(
+        <DynamicPropertiesPanel
+          entry={makeEntry()} content="" frontmatter={{}}
+          entries={typeEntries} onUpdateProperty={onUpdateProperty}
+        />
+      )
+      expect(screen.getByTestId('type-selector')).toBeInTheDocument()
+      expect(screen.getByRole('combobox')).toBeInTheDocument()
+    })
+
+    it('shows available types in dropdown', () => {
+      render(
+        <DynamicPropertiesPanel
+          entry={makeEntry()} content="" frontmatter={{}}
+          entries={typeEntries} onUpdateProperty={onUpdateProperty}
+        />
+      )
+      fireEvent.pointerDown(screen.getByRole('combobox'), { button: 0, pointerType: 'mouse' })
+      expect(screen.getByRole('option', { name: 'None' })).toBeInTheDocument()
+      expect(screen.getByRole('option', { name: 'Person' })).toBeInTheDocument()
+      expect(screen.getByRole('option', { name: 'Project' })).toBeInTheDocument()
+      expect(screen.getByRole('option', { name: 'Topic' })).toBeInTheDocument()
+    })
+
+    function openAndSelect(optionName: string) {
+      fireEvent.pointerDown(screen.getByRole('combobox'), { button: 0, pointerType: 'mouse' })
+      fireEvent.click(screen.getByRole('option', { name: optionName }))
+    }
+
+    it('calls onUpdateProperty when type selected', () => {
+      render(
+        <DynamicPropertiesPanel
+          entry={makeEntry()} content="" frontmatter={{}}
+          entries={typeEntries} onUpdateProperty={onUpdateProperty}
+        />
+      )
+      openAndSelect('Project')
+      expect(onUpdateProperty).toHaveBeenCalledWith('type', 'Project')
+    })
+
+    it('clears type when None selected', () => {
+      render(
+        <DynamicPropertiesPanel
+          entry={makeEntry({ isA: 'Project' })} content="" frontmatter={{}}
+          entries={typeEntries} onUpdateProperty={onUpdateProperty}
+        />
+      )
+      openAndSelect('None')
+      expect(onUpdateProperty).toHaveBeenCalledWith('type', null)
+    })
+
+    it('shows current type even when not in available types', () => {
+      render(
+        <DynamicPropertiesPanel
+          entry={makeEntry({ isA: 'CustomType' })} content="" frontmatter={{}}
+          entries={typeEntries} onUpdateProperty={onUpdateProperty}
+        />
+      )
+      fireEvent.pointerDown(screen.getByRole('combobox'), { button: 0, pointerType: 'mouse' })
+      expect(screen.getByRole('option', { name: 'CustomType' })).toBeInTheDocument()
+    })
+
+    it('shows None placeholder when entry has no type', () => {
+      render(
+        <DynamicPropertiesPanel
+          entry={makeEntry({ isA: null })} content="" frontmatter={{}}
+          entries={typeEntries} onUpdateProperty={onUpdateProperty}
+        />
+      )
+      expect(screen.getByTestId('type-selector')).toBeInTheDocument()
+      expect(screen.getByText('None')).toBeInTheDocument()
+    })
+  })
+
   it('renders modified date', () => {
     render(
       <DynamicPropertiesPanel
diff --git a/src/components/DynamicPropertiesPanel.tsx b/src/components/DynamicPropertiesPanel.tsx
index 419d035d..0148cccb 100644
--- a/src/components/DynamicPropertiesPanel.tsx
+++ b/src/components/DynamicPropertiesPanel.tsx
@@ -5,6 +5,7 @@ import type { ParsedFrontmatter } from '../utils/frontmatter'
 import { EditableValue, TagPillList, UrlValue } from './EditableValue'
 import { isUrlValue } from '../utils/url'
 import { Button } from '@/components/ui/button'
+import { Select, SelectContent, SelectItem, SelectSeparator, SelectTrigger, SelectValue } from '@/components/ui/select'
 import { getTypeColor, getTypeLightColor } from '../utils/typeColors'
 import { countWords } from '../utils/wikilinks'
 
@@ -144,7 +145,9 @@ function AddPropertyForm({ onAdd, onCancel }: { onAdd: (key: string, value: stri
   )
 }
 
-function TypeRow({ isA, onNavigate }: { isA?: string | null; onNavigate?: (target: string) => void }) {
+const TYPE_NONE = '__none__'
+
+function ReadOnlyType({ isA, onNavigate }: { isA?: string | null; onNavigate?: (target: string) => void }) {
   if (!isA) return null
   return (
     <div className="flex items-center justify-between">
@@ -162,6 +165,47 @@ function TypeRow({ isA, onNavigate }: { isA?: string | null; onNavigate?: (targe
   )
 }
 
+function TypeSelector({ isA, availableTypes, onUpdateProperty, onNavigate }: {
+  isA?: string | null; availableTypes: string[]
+  onUpdateProperty?: (key: string, value: FrontmatterValue) => void
+  onNavigate?: (target: string) => void
+}) {
+  if (!onUpdateProperty) return <ReadOnlyType isA={isA} onNavigate={onNavigate} />
+
+  const currentValue = isA || TYPE_NONE
+  const options = isA && !availableTypes.includes(isA)
+    ? [...availableTypes, isA].sort((a, b) => a.localeCompare(b))
+    : availableTypes
+
+  return (
+    <div className="flex items-center justify-between" data-testid="type-selector">
+      <span className="font-mono-overline shrink-0 text-muted-foreground">Type</span>
+      <Select value={currentValue} onValueChange={v => onUpdateProperty('type', v === TYPE_NONE ? null : v)}>
+        <SelectTrigger
+          size="sm"
+          className="h-auto min-h-0 gap-1 border-none px-2 py-0.5 shadow-none"
+          style={isA ? {
+            background: getTypeLightColor(isA),
+            color: getTypeColor(isA),
+            fontSize: 12,
+            fontWeight: 500,
+            borderRadius: 6,
+          } : { fontSize: 12, borderRadius: 6 }}
+        >
+          <SelectValue placeholder="None" />
+        </SelectTrigger>
+        <SelectContent>
+          <SelectItem value={TYPE_NONE}>None</SelectItem>
+          <SelectSeparator />
+          {options.map(type => (
+            <SelectItem key={type} value={type}>{type}</SelectItem>
+          ))}
+        </SelectContent>
+      </Select>
+    </div>
+  )
+}
+
 function PropertyRow({ propKey, value, editingKey, onStartEdit, onSave, onSaveList, onUpdate, onDelete }: {
   propKey: string; value: FrontmatterValue; editingKey: string | null
   onStartEdit: (key: string | null) => void; onSave: (key: string, value: string) => void
@@ -219,6 +263,7 @@ export function DynamicPropertiesPanel({
   entry,
   content,
   frontmatter,
+  entries,
   onUpdateProperty,
   onDeleteProperty,
   onAddProperty,
@@ -227,6 +272,7 @@ export function DynamicPropertiesPanel({
   entry: VaultEntry
   content: string | null
   frontmatter: ParsedFrontmatter
+  entries?: VaultEntry[]
   onUpdateProperty?: (key: string, value: FrontmatterValue) => void
   onDeleteProperty?: (key: string) => void
   onAddProperty?: (key: string, value: FrontmatterValue) => void
@@ -237,6 +283,13 @@ export function DynamicPropertiesPanel({
 
   const wordCount = countWords(content ?? '')
 
+  const availableTypes = useMemo(() =>
+    (entries ?? [])
+      .filter(e => e.isA === 'Type')
+      .map(e => e.title)
+      .sort((a, b) => a.localeCompare(b))
+  , [entries])
+
   const propertyEntries = useMemo(() => {
     return Object.entries(frontmatter)
       .filter(([key, value]) => !SKIP_KEYS.has(key) && !RELATIONSHIP_KEYS.has(key) && !containsWikilinks(value))
@@ -264,7 +317,7 @@ export function DynamicPropertiesPanel({
     <div className="flex flex-col gap-3">
       {/* Editable properties section */}
       <div className="flex flex-col gap-2">
-        <TypeRow isA={entry.isA} onNavigate={onNavigate} />
+        <TypeSelector isA={entry.isA} availableTypes={availableTypes} onUpdateProperty={onUpdateProperty} onNavigate={onNavigate} />
         {propertyEntries.map(([key, value]) => (
           <PropertyRow key={key} propKey={key} value={value} editingKey={editingKey} onStartEdit={setEditingKey} onSave={handleSaveValue} onSaveList={handleSaveList} onUpdate={onUpdateProperty} onDelete={onDeleteProperty} />
         ))}
diff --git a/src/components/Inspector.tsx b/src/components/Inspector.tsx
index 16aa95f0..43d85c75 100644
--- a/src/components/Inspector.tsx
+++ b/src/components/Inspector.tsx
@@ -141,6 +141,7 @@ export function Inspector({
             <>
               <DynamicPropertiesPanel
                 entry={entry} content={content} frontmatter={frontmatter}
+                entries={entries}
                 onUpdateProperty={onUpdateFrontmatter ? handleUpdateProperty : undefined}
                 onDeleteProperty={onDeleteProperty ? handleDeleteProperty : undefined}
                 onAddProperty={onAddProperty ? handleAddProperty : undefined}