diff --git a/.sisyphus/notepads/keyvisual-background-nametag/learnings.md b/.sisyphus/notepads/keyvisual-background-nametag/learnings.md
index 3aebb82..0ec0d84 100644
--- a/.sisyphus/notepads/keyvisual-background-nametag/learnings.md
+++ b/.sisyphus/notepads/keyvisual-background-nametag/learnings.md
@@ -43,3 +43,11 @@ ## [2026-05-30] Task: T3
 - `Service` accessors use `Attribute::get(fn () => $this->... ? '/storage/'.$this->... : null)` for `keyVisualUrl` and `backgroundUrl`
 - Added all 4 new fields to `Service::$fillable` so `fill()`/`save()` persists them
 - Full suite green after fresh migrate: `ddev exec php artisan test` → 510 passed
+
+## [2026-05-30] Task: T4
+- Setting keys added to `SettingsController::AGENDA_KEYS` constant (single source for both index() props and update() Rule::in validation): `current_key_visual`, `current_background`, `namenseinblender_macro_name`, `namenseinblender_macro_uuid`, `namenseinblender_macro_collection_name`, `namenseinblender_macro_collection_uuid`.
+- PATCH /settings (route `settings.update`) validates `key` via `Rule::in(self::AGENDA_KEYS)`, `value` nullable string max:500, persists via `Setting::set()`.
+- `HandleInertiaRequests::share()` now globally exposes: `namenseinblenderMacro` => {name, uuid, collection_name (default '--MAIN--'), collection_uuid}, plus `currentKeyVisual`, `currentBackground`.
+- NOTE: namenseinblenderMacro uses snake_case keys (name/uuid/collection_name/collection_uuid) — differs from existing `macroSettings` which uses camelCase (collectionName/collectionUuid). T10/T14 consumers must use snake_case for namenseinblender.
+- Test file `tests/Feature/NamenseinblenderSettingTest.php` (Pest, 4 tests). Inertia prop assertions use `->where('namenseinblenderMacro.name', ...)` dot-path on shared props from any authed page (settings.index).
+- 514 app tests green (510 baseline + 4 new). Pint clean.
diff --git a/app/Http/Controllers/SettingsController.php b/app/Http/Controllers/SettingsController.php
index c81c0f6..d5bb21b 100644
--- a/app/Http/Controllers/SettingsController.php
+++ b/app/Http/Controllers/SettingsController.php
@@ -21,6 +21,12 @@ class SettingsController extends Controller
         'agenda_announcement_position',
         'agenda_sermon_matching',
         'default_translation_language',
+        'current_key_visual',
+        'current_background',
+        'namenseinblender_macro_name',
+        'namenseinblender_macro_uuid',
+        'namenseinblender_macro_collection_name',
+        'namenseinblender_macro_collection_uuid',
     ];
 
     public function index(): Response
diff --git a/app/Http/Middleware/HandleInertiaRequests.php b/app/Http/Middleware/HandleInertiaRequests.php
index 4125518..8b7648f 100644
--- a/app/Http/Middleware/HandleInertiaRequests.php
+++ b/app/Http/Middleware/HandleInertiaRequests.php
@@ -53,6 +53,14 @@ public function share(Request $request): array
                 'collectionName' => Setting::get('macro_collection_name', '--MAIN--'),
                 'collectionUuid' => Setting::get('macro_collection_uuid', '8D02FC57-83F8-4042-9B90-81C229728426'),
             ],
+            'namenseinblenderMacro' => [
+                'name' => Setting::get('namenseinblender_macro_name'),
+                'uuid' => Setting::get('namenseinblender_macro_uuid'),
+                'collection_name' => Setting::get('namenseinblender_macro_collection_name', '--MAIN--'),
+                'collection_uuid' => Setting::get('namenseinblender_macro_collection_uuid'),
+            ],
+            'currentKeyVisual' => Setting::get('current_key_visual'),
+            'currentBackground' => Setting::get('current_background'),
         ];
     }
 }
diff --git a/tests/Feature/NamenseinblenderSettingTest.php b/tests/Feature/NamenseinblenderSettingTest.php
new file mode 100644
index 0000000..e9b8960
--- /dev/null
+++ b/tests/Feature/NamenseinblenderSettingTest.php
@@ -0,0 +1,74 @@
+<?php
+
+use App\Models\Setting;
+use App\Models\User;
+
+beforeEach(function () {
+    $this->user = User::factory()->create();
+});
+
+test('patch namenseinblender macro name and uuid persists settings', function () {
+    $this->actingAs($this->user)
+        ->patchJson(route('settings.update'), [
+            'key' => 'namenseinblender_macro_name',
+            'value' => 'Namenseinblender',
+        ])->assertOk()->assertJson(['success' => true]);
+
+    $this->actingAs($this->user)
+        ->patchJson(route('settings.update'), [
+            'key' => 'namenseinblender_macro_uuid',
+            'value' => 'ABC-123',
+        ])->assertOk()->assertJson(['success' => true]);
+
+    expect(Setting::get('namenseinblender_macro_name'))->toBe('Namenseinblender');
+    expect(Setting::get('namenseinblender_macro_uuid'))->toBe('ABC-123');
+});
+
+test('namenseinblender macro shared prop reflects persisted values', function () {
+    Setting::set('namenseinblender_macro_name', 'Namenseinblender');
+    Setting::set('namenseinblender_macro_uuid', 'ABC-123');
+
+    $this->actingAs($this->user)
+        ->withoutVite()
+        ->get(route('settings.index'))
+        ->assertInertia(
+            fn ($page) => $page
+                ->where('namenseinblenderMacro.name', 'Namenseinblender')
+                ->where('namenseinblenderMacro.uuid', 'ABC-123')
+                ->where('namenseinblenderMacro.collection_name', '--MAIN--')
+        );
+});
+
+test('current_background setting persists and is shared as prop', function () {
+    $this->actingAs($this->user)
+        ->patchJson(route('settings.update'), [
+            'key' => 'current_background',
+            'value' => 'slides/bg.jpg',
+        ])->assertOk()->assertJson(['success' => true]);
+
+    expect(Setting::get('current_background'))->toBe('slides/bg.jpg');
+
+    $this->actingAs($this->user)
+        ->withoutVite()
+        ->get(route('settings.index'))
+        ->assertInertia(
+            fn ($page) => $page->where('currentBackground', 'slides/bg.jpg')
+        );
+});
+
+test('current_key_visual setting persists and is shared as prop', function () {
+    $this->actingAs($this->user)
+        ->patchJson(route('settings.update'), [
+            'key' => 'current_key_visual',
+            'value' => 'slides/key.jpg',
+        ])->assertOk()->assertJson(['success' => true]);
+
+    expect(Setting::get('current_key_visual'))->toBe('slides/key.jpg');
+
+    $this->actingAs($this->user)
+        ->withoutVite()
+        ->get(route('settings.index'))
+        ->assertInertia(
+            fn ($page) => $page->where('currentKeyVisual', 'slides/key.jpg')
+        );
+});