diff --git a/app/src/main/java/de/webidsolutions/metaplugindemo/MainActivity.kt b/app/src/main/java/de/webidsolutions/metaplugindemo/MainActivity.kt
index fee2727..6c2cff6 100644
--- a/app/src/main/java/de/webidsolutions/metaplugindemo/MainActivity.kt
+++ b/app/src/main/java/de/webidsolutions/metaplugindemo/MainActivity.kt
@@ -45,7 +45,7 @@ private val config = VideoOptionsConfig(
 )
 
 // TODO insert your Action id
-private const val actionId = "<9_digit_webid_transaction_id>"
+private const val actionId = "348758601"
 
 // TODO choose your environment
 private val chosenEnvironment: EWebIDEnv = EWebIDEnv.TEST
diff --git a/app/src/main/res/layout/activity_main.xml b/app/src/main/res/layout/activity_main.xml
index b5da5e9..a311fc9 100644
--- a/app/src/main/res/layout/activity_main.xml
+++ b/app/src/main/res/layout/activity_main.xml
@@ -55,6 +55,41 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toBottomOf="@+id/cb_plugin_eid_on_server" />
 
+    <TextView
+        android:id="@+id/tv_theming_header"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginStart="30dp"
+        android:layout_marginTop="20dp"
+        android:text="@string/choose_theming"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@id/cb_plugin_video" />
+
+    <RadioGroup
+        android:id="@+id/themeChoiceGroup"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:orientation="horizontal"
+        android:layout_marginStart="30dp"
+        android:layout_marginTop="10dp"
+        app:layout_constraintTop_toBottomOf="@id/tv_theming_header"
+        app:layout_constraintStart_toStartOf="parent">
+
+        <RadioButton
+            android:id="@+id/rb_code_theming"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="Code-Theming"
+            android:checked="true" />
+
+        <RadioButton
+            android:id="@+id/rb_xml_theming"
+            android:layout_width="wrap_content"
+            android:layout_height="wrap_content"
+            android:text="XML-Theming"
+            android:layout_marginStart="24dp" />
+    </RadioGroup>
+
     <TextView
         android:id="@+id/logHeadline"
         android:layout_width="wrap_content"
@@ -64,7 +99,7 @@
         android:text="@string/log_headline"
         android:textSize="20sp"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/cb_plugin_video" />
+        app:layout_constraintTop_toBottomOf="@+id/themeChoiceGroup" />
 
     <ScrollView
         android:id="@+id/scrollViewLog"
diff --git a/app/src/main/res/values-de/strings.xml b/app/src/main/res/values-de/strings.xml
index 38a8e8b..6d97809 100644
--- a/app/src/main/res/values-de/strings.xml
+++ b/app/src/main/res/values-de/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK erfolgreich erstellt</string>
     <string name="validate_action_id">Validiere Vorgangsnummer…</string>
     <string name="action_id_not_valid">Fehler: Die Vorgangsnummer (Action-ID) wurde in der Datei „MainActivity.kt“ nicht auf eine 9-stellige Zahlenfolge gesetzt.</string>
+    <string name="choose_theming">Designauswahl</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-es/strings.xml b/app/src/main/res/values-es/strings.xml
index e9abb2f..03817eb 100644
--- a/app/src/main/res/values-es/strings.xml
+++ b/app/src/main/res/values-es/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK creado correctamente</string>
     <string name="validate_action_id">Validar número de operación…</string>
     <string name="action_id_not_valid">Error: El número de operación («action-ID») no se ha establecido en una secuencia numérica de 9 dígitos en el archivo «MainActivity.kt».</string>
+    <string name="choose_theming">Seleccionar tema</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-fr/strings.xml b/app/src/main/res/values-fr/strings.xml
index b0b6721..953c560 100644
--- a/app/src/main/res/values-fr/strings.xml
+++ b/app/src/main/res/values-fr/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK créé avec succès</string>
     <string name="validate_action_id">Valider le numéro d\'opération…</string>
     <string name="action_id_not_valid">Erreur : le numéro d\'opération (ActionID) n\'a pas été défini sur une séquence de 9 chiffres dans le fichier « MainActivity.kt ».</string>
+    <string name="choose_theming">Choisir le thème</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-it/strings.xml b/app/src/main/res/values-it/strings.xml
index 3282bfc..3d88625 100644
--- a/app/src/main/res/values-it/strings.xml
+++ b/app/src/main/res/values-it/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK creato con successo</string>
     <string name="validate_action_id">Convalida numero operazione…</string>
     <string name="action_id_not_valid">Errore: il numero dell\'operazione (ActionID) non è stato impostato su una sequenza di 9 cifre nel file “MainActivity.kt”.</string>
+    <string name="choose_theming">Scegli il tema</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-nl/strings.xml b/app/src/main/res/values-nl/strings.xml
index d7087e0..8ede8a4 100644
--- a/app/src/main/res/values-nl/strings.xml
+++ b/app/src/main/res/values-nl/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK succesvol aangemaakt</string>
     <string name="validate_action_id">Valideer transactienummer…</string>
     <string name="action_id_not_valid">Fout: het actienummer (ActionID) is in het bestand “MainActivity.kt” niet ingesteld op een reeks van 9 cijfers.</string>
+    <string name="choose_theming">Thema kiezen</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-pl/strings.xml b/app/src/main/res/values-pl/strings.xml
index e9649f4..2556d77 100644
--- a/app/src/main/res/values-pl/strings.xml
+++ b/app/src/main/res/values-pl/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK utworzony pomyślnie</string>
     <string name="validate_action_id">Zatwierdź numer operacji…</string>
     <string name="action_id_not_valid">Błąd: Numer operacji (Action-ID) nie został ustawiony na 9-cyfrową sekwencję cyfr w pliku „MainActivity.kt”.</string>
+    <string name="choose_theming">Wybierz motyw</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-ro/strings.xml b/app/src/main/res/values-ro/strings.xml
index 29687e7..009945b 100644
--- a/app/src/main/res/values-ro/strings.xml
+++ b/app/src/main/res/values-ro/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK creat cu succes</string>
     <string name="validate_action_id">Validați numărul operațiunii…</string>
     <string name="action_id_not_valid">Eroare: Numărul operațiunii („Action-ID”) nu a fost setat la o secvență de 9 cifre în fișierul „MainActivity.kt”.</string>
+    <string name="choose_theming">Alege tema</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values-tr/strings.xml b/app/src/main/res/values-tr/strings.xml
index c515290..6b44455 100644
--- a/app/src/main/res/values-tr/strings.xml
+++ b/app/src/main/res/values-tr/strings.xml
@@ -9,4 +9,5 @@
     <string name="core_sdk_creation_successful">Core SDK başarıyla oluşturuldu</string>
     <string name="validate_action_id">İşlem numarasını doğrula…</string>
     <string name="action_id_not_valid">Hata: İşlem numarası (Action-ID) “MainActivity.kt” dosyasında 9 basamaklı bir sayı dizisi olarak ayarlanmamıştır.</string>
+    <string name="choose_theming">Tema seç</string>
 </resources>
\ No newline at end of file
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index b49bc6f..76c378c 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -8,4 +8,5 @@
     <string name="core_sdk_creation_successful">Core SDK creation successful</string>
     <string name="validate_action_id">Validate Action-ID…</string>
     <string name="action_id_not_valid">Failure: The transaction number (Action-ID) was not set to 9-digit number string in MainActivity.kt file.</string>
+    <string name="choose_theming">Choose theming</string>
 </resources>
\ No newline at end of file