diff --git a/vector/src/main/java/im/vector/riotredesign/core/platform/RiotActivity.kt b/vector/src/main/java/im/vector/riotredesign/core/platform/RiotActivity.kt
index 06b1d3640f..9e64e2940c 100644
--- a/vector/src/main/java/im/vector/riotredesign/core/platform/RiotActivity.kt
+++ b/vector/src/main/java/im/vector/riotredesign/core/platform/RiotActivity.kt
@@ -23,11 +23,13 @@ import android.view.MenuItem
 import android.view.View
 import androidx.annotation.*
 import androidx.appcompat.widget.Toolbar
+import androidx.coordinatorlayout.widget.CoordinatorLayout
 import butterknife.BindView
 import butterknife.ButterKnife
 import butterknife.Unbinder
 import com.airbnb.mvrx.BaseMvRxActivity
 import com.bumptech.glide.util.Util
+import com.google.android.material.snackbar.Snackbar
 import im.vector.riotredesign.BuildConfig
 import im.vector.riotredesign.R
 import im.vector.riotredesign.features.rageshake.BugReportActivity
@@ -47,8 +49,14 @@ abstract class RiotActivity : BaseMvRxActivity() {
      * ========================================================================================== */
 
     @Nullable
+    @JvmField
     @BindView(R.id.toolbar)
-    protected lateinit var toolbar: Toolbar
+    var toolbar: Toolbar? = null
+
+    @Nullable
+    @JvmField
+    @BindView(R.id.vector_coordinator_layout)
+    var coordinatorLayout: CoordinatorLayout? = null
 
     /* ==========================================================================================
      * DATA
@@ -269,4 +277,23 @@ abstract class RiotActivity : BaseMvRxActivity() {
      * Return a object containing other themes for this activity
      */
     open fun getOtherThemes(): ActivityOtherThemes = ActivityOtherThemes.Default
+
+    /* ==========================================================================================
+     * PUBLIC METHODS
+     * ========================================================================================== */
+
+    protected fun showSnackbar(message: String) {
+        coordinatorLayout?.let {
+            Snackbar.make(it, message, Snackbar.LENGTH_SHORT)
+        }
+    }
+
+    /* ==========================================================================================
+     * Temporary method
+     * ========================================================================================== */
+
+    protected fun notImplemented() {
+        showSnackbar(getString(R.string.not_implemented))
+    }
+
 }
\ No newline at end of file
diff --git a/vector/src/main/java/im/vector/riotredesign/core/platform/VectorPreferenceFragment.kt b/vector/src/main/java/im/vector/riotredesign/core/platform/VectorPreferenceFragment.kt
index f9f327d34e..385c405b9c 100644
--- a/vector/src/main/java/im/vector/riotredesign/core/platform/VectorPreferenceFragment.kt
+++ b/vector/src/main/java/im/vector/riotredesign/core/platform/VectorPreferenceFragment.kt
@@ -18,6 +18,8 @@ package im.vector.riotredesign.core.platform
 
 import androidx.annotation.CallSuper
 import androidx.preference.PreferenceFragmentCompat
+import im.vector.riotredesign.R
+import im.vector.riotredesign.core.utils.toast
 import timber.log.Timber
 
 abstract class VectorPreferenceFragment : PreferenceFragmentCompat() {
@@ -37,4 +39,14 @@ abstract class VectorPreferenceFragment : PreferenceFragmentCompat() {
         Timber.d("onResume Fragment ${this.javaClass.simpleName}")
     }
 
+    /* ==========================================================================================
+     * Protected
+     * ========================================================================================== */
+
+    protected fun notImplemented() {
+        // Snackbar cannot be display on PreferenceFragment
+        // Snackbar.make(view!!, R.string.not_implemented, Snackbar.LENGTH_SHORT)
+        activity?.toast(R.string.not_implemented)
+    }
+
 }
\ No newline at end of file
diff --git a/vector/src/main/java/im/vector/riotredesign/features/settings/VectorSettingsPreferencesFragment.kt b/vector/src/main/java/im/vector/riotredesign/features/settings/VectorSettingsPreferencesFragment.kt
index 474b2aaf90..0c096233f7 100755
--- a/vector/src/main/java/im/vector/riotredesign/features/settings/VectorSettingsPreferencesFragment.kt
+++ b/vector/src/main/java/im/vector/riotredesign/features/settings/VectorSettingsPreferencesFragment.kt
@@ -305,6 +305,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
             }
 
             it.setOnPreferenceClickListener {
+                notImplemented()
                 // TODO val intent = PhoneNumberAdditionActivity.getIntent(activity, mSession.credentials.userId)
                 // startActivityForResult(intent, REQUEST_NEW_PHONE_NUMBER)
                 true
@@ -382,6 +383,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
 
         // Notification privacy
         mNotificationPrivacyPreference.onPreferenceClickListener = Preference.OnPreferenceClickListener {
+            notImplemented()
             // TODO startActivity(NotificationPrivacyActivity.getIntent(activity))
             true
         }
@@ -475,6 +477,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                         AlertDialog.Builder(activity)
                                 .setMessage(R.string.room_settings_labs_end_to_end_warnings)
                                 .setPositiveButton(R.string.logout) { _, _ ->
+                                    notImplemented()
                                     // TODO CommonActivityUtils.logout(activity)
                                 }
                                 .setNegativeButton(R.string.cancel) { _, _ ->
@@ -489,6 +492,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                     val newValue = newValueAsVoid as Boolean
 
                     if (mSession.isCryptoEnabled() != newValue) {
+                        notImplemented()
                         /* TODO
                         displayLoadingView()
 
@@ -533,6 +537,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         // SaveMode Management
         findPreference(PreferencesManager.SETTINGS_DATA_SAVE_MODE_PREFERENCE_KEY)
                 .onPreferenceChangeListener = Preference.OnPreferenceChangeListener { _, newValue ->
+            notImplemented()
             /* TODO
             val sessions = Matrix.getMXSessions(activity)
             for (session in sessions) {
@@ -621,6 +626,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         // copyright
         findPreference(PreferencesManager.SETTINGS_COPYRIGHT_PREFERENCE_KEY)
                 .onPreferenceClickListener = Preference.OnPreferenceClickListener {
+            notImplemented()
             // TODO VectorUtils.displayAppCopyright()
             false
         }
@@ -628,6 +634,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         // terms & conditions
         findPreference(PreferencesManager.SETTINGS_APP_TERM_CONDITIONS_PREFERENCE_KEY)
                 .onPreferenceClickListener = Preference.OnPreferenceClickListener {
+            notImplemented()
             // TODO VectorUtils.displayAppTac()
             false
         }
@@ -635,6 +642,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         // privacy policy
         findPreference(PreferencesManager.SETTINGS_PRIVACY_POLICY_PREFERENCE_KEY)
                 .onPreferenceClickListener = Preference.OnPreferenceClickListener {
+            notImplemented()
             // TODO VectorUtils.displayAppPrivacyPolicy()
             false
         }
@@ -642,6 +650,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         // third party notice
         findPreference(PreferencesManager.SETTINGS_THIRD_PARTY_NOTICES_PREFERENCE_KEY)
                 .onPreferenceClickListener = Preference.OnPreferenceClickListener {
+            notImplemented()
             // TODO VectorUtils.displayThirdPartyLicenses()
             false
         }
@@ -678,8 +687,11 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                     }
                 }
             })
+            */
 
             it.onPreferenceClickListener = Preference.OnPreferenceClickListener {
+                notImplemented()
+                /* TODO
                 displayLoadingView()
 
                 val task = ClearMediaCacheAsyncTask(
@@ -705,10 +717,10 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                     task.cancel(true)
                     hideLoadingView()
                 }
+            */
 
                 false
             }
-            */
         }
 
         // Incoming call sounds
@@ -739,7 +751,8 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
              */
 
             it.onPreferenceClickListener = Preference.OnPreferenceClickListener {
-                displayLoadingView()
+                notImplemented()
+                // displayLoadingView()
                 // TODO Matrix.getInstance(appContext).reloadSessions(appContext)
                 false
             }
@@ -751,6 +764,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         findPreference(PreferencesManager.SETTINGS_DEACTIVATE_ACCOUNT_KEY)
                 .onPreferenceClickListener = Preference.OnPreferenceClickListener {
             activity?.let {
+                notImplemented()
                 // TODO startActivity(DeactivateAccountActivity.getIntent(it))
             }
 
@@ -795,7 +809,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         super.onResume()
 
         // find the view from parent activity
-        // TODO mLoadingView = activity?.findViewById(R.id.vector_settings_spinner_views)
+        mLoadingView = activity?.findViewById(R.id.vector_settings_spinner_views)
 
         /* TODO
         if (mSession.isAlive) {
@@ -880,7 +894,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
             var parent = view
 
             while (parent != null && mLoadingView == null) {
-                // TODO mLoadingView = parent.findViewById(R.id.vector_settings_spinner_views)
+                mLoadingView = parent.findViewById(R.id.vector_settings_spinner_views)
                 parent = parent.parent as View
             }
         } else {
@@ -1080,6 +1094,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                     val oldPwd = oldPasswordText.text.toString().trim()
                     val newPwd = newPasswordText.text.toString().trim()
 
+                    notImplemented()
                     /* TODO
                     showPasswordLoadingView(true)
 
@@ -1128,6 +1143,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      */
 
     private fun onPushRuleClick(preferenceKey: String, newValue: Boolean) {
+        notImplemented()
         /* TODO
         val matrixInstance = Matrix.getInstance(context)
         val pushManager = matrixInstance.pushManager
@@ -1248,6 +1264,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      * Update the displayname.
      */
     private fun onDisplayNameClick(value: String?) {
+        notImplemented()
         /* TODO
         if (!TextUtils.equals(mSession.myUser.displayname, value)) {
             displayLoadingView()
@@ -1302,6 +1319,8 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      * Update the avatar.
      */
     private fun onUpdateAvatarClick() {
+        notImplemented()
+
         /* TODO
         if (checkPermissions(PERMISSIONS_FOR_TAKING_PHOTO, this, PERMISSION_REQUEST_CODE_LAUNCH_CAMERA)) {
             changeAvatar()
@@ -1471,6 +1490,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                     .setTitle(R.string.dialog_title_confirmation)
                     .setMessage(dialogMessage)
                     .setPositiveButton(R.string.remove) { _, _ ->
+                        notImplemented()
                         /* TODO
                         displayLoadingView()
 
@@ -1542,6 +1562,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
                                     val idsList = ArrayList<String>()
                                     idsList.add(userId)
 
+                                    notImplemented()
                                     /* TODO
                                     mSession.unIgnoreUsers(idsList, object : ApiCallback<Void> {
                                         override fun onSuccess(info: Void?) {
@@ -1771,6 +1792,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
             return
         }
 
+        notImplemented()
         /* TODO
         val pid = ThreePid(email, ThreePid.MEDIUM_EMAIL)
 
@@ -1976,6 +1998,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
         selectedLanguagePreference.summary = VectorLocale.localeToLocalisedString(VectorLocale.applicationLocale)
 
         selectedLanguagePreference.onPreferenceClickListener = Preference.OnPreferenceClickListener {
+            notImplemented()
             // TODO startActivityForResult(LanguagePickerActivity.getIntent(activity), REQUEST_LOCALE)
             true
         }
@@ -2159,6 +2182,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
 
             manageBackupPref.onPreferenceClickListener = Preference.OnPreferenceClickListener {
                 context?.let {
+                    notImplemented()
                     // TODO startActivity(KeysBackupManageActivity.intent(it, mSession.myUserId))
                 }
                 false
@@ -2427,6 +2451,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
             val layout = inflater.inflate(R.layout.dialog_base_edit_text, null)
 
             val input = layout.findViewById<EditText>(R.id.edit_text)
+            notImplemented()
             /* TODO
             input.setText(aDeviceInfoToRename.display_name)
 
@@ -2487,8 +2512,9 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      * @param deviceId the device id
      */
     private fun deleteDevice(deviceId: String) {
-        displayLoadingView()
+        notImplemented()
         /* TODO
+        displayLoadingView()
         mSession.deleteDevice(deviceId, mAccountPassword, object : ApiCallback<Void> {
             override fun onSuccess(info: Void?) {
                 hideLoadingView()
@@ -2522,6 +2548,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      * @param aDeviceInfoToDelete device info
      */
     private fun displayDeviceDeletionDialog(aDeviceInfoToDelete: DeviceInfo) {
+        notImplemented()
         /*
         TODO
         if (aDeviceInfoToDelete.device_id != null) {
@@ -2569,6 +2596,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      * Manage the e2e keys export.
      */
     private fun exportKeys() {
+        notImplemented()
         // We need WRITE_EXTERNAL permission
         /*
         TODO
@@ -2616,6 +2644,7 @@ class VectorSettingsPreferencesFragment : VectorPreferenceFragment(), SharedPref
      */
     @SuppressLint("NewApi")
     private fun importKeys() {
+        notImplemented()
         // TODO activity?.let { openFileSelection(it, this, false, REQUEST_E2E_FILE_REQUEST_CODE) }
     }
 
diff --git a/vector/src/main/res/layout/activity_media_viewer.xml b/vector/src/main/res/layout/activity_media_viewer.xml
index b3156f1478..9927331ed4 100644
--- a/vector/src/main/res/layout/activity_media_viewer.xml
+++ b/vector/src/main/res/layout/activity_media_viewer.xml
@@ -7,6 +7,7 @@
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/mediaViewerToolbar"
+        style="@style/VectorToolbarStyle"
         android:layout_width="match_parent"
         android:layout_height="?attr/actionBarSize"
         android:background="?attr/colorPrimary"
diff --git a/vector/src/main/res/layout/activity_vector_settings.xml b/vector/src/main/res/layout/activity_vector_settings.xml
index a9ba7063fa..a1d8c2f246 100755
--- a/vector/src/main/res/layout/activity_vector_settings.xml
+++ b/vector/src/main/res/layout/activity_vector_settings.xml
@@ -1,5 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
-<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.coordinatorlayout.widget.CoordinatorLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/vector_coordinator_layout"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
@@ -38,4 +39,4 @@
             android:visibility="visible" />
     </FrameLayout>
 
-</FrameLayout>
+</androidx.coordinatorlayout.widget.CoordinatorLayout>
diff --git a/vector/src/main/res/layout/fragment_room_detail.xml b/vector/src/main/res/layout/fragment_room_detail.xml
index 452a9da87d..9f19557e53 100644
--- a/vector/src/main/res/layout/fragment_room_detail.xml
+++ b/vector/src/main/res/layout/fragment_room_detail.xml
@@ -7,6 +7,7 @@
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/toolbar"
+        style="@style/VectorToolbarStyle"
         android:layout_width="0dp"
         android:layout_height="?actionBarSize"
         android:background="?attr/colorPrimary"
@@ -40,6 +41,7 @@
                 android:layout_marginEnd="8dp"
                 android:ellipsize="end"
                 android:maxLines="1"
+                android:textColor="?vctr_toolbar_primary_text_color"
                 android:textSize="18sp"
                 app:layout_constraintBottom_toTopOf="@+id/toolbarSubtitleView"
                 app:layout_constraintEnd_toEndOf="parent"
@@ -57,6 +59,7 @@
                 android:layout_marginBottom="8dp"
                 android:ellipsize="end"
                 android:maxLines="1"
+                android:textColor="?vctr_toolbar_secondary_text_color"
                 app:layout_constraintBottom_toBottomOf="parent"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintHorizontal_bias="0.0"
@@ -76,13 +79,14 @@
         app:layout_constraintBottom_toTopOf="@+id/composerDivider"
         app:layout_constraintEnd_toEndOf="parent"
         app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@id/toolbar" />
+        app:layout_constraintTop_toBottomOf="@id/toolbar"
+        tools:listitem="@layout/item_timeline_event_text_message" />
 
     <View
         android:id="@+id/composerDivider"
         android:layout_width="match_parent"
         android:layout_height="1dp"
-        android:background="@color/pale_grey"
+        android:background="?vctr_list_divider_color"
         app:layout_constraintBottom_toTopOf="@+id/composerLayout" />
 
     <RelativeLayout
diff --git a/vector/src/main/res/values/donottranslate.xml b/vector/src/main/res/values/donottranslate.xml
index b68eff483b..f5974e18a5 100755
--- a/vector/src/main/res/values/donottranslate.xml
+++ b/vector/src/main/res/values/donottranslate.xml
@@ -8,4 +8,7 @@
 
     <string name="password_hint" translatable="false">********</string>
 
+    <!-- Temporary string -->
+    <string name="not_implemented" translatable="false">Not implemented yet in RiotX</string>
+
 </resources>
diff --git a/vector/src/main/res/values/styles_riot.xml b/vector/src/main/res/values/styles_riot.xml
index 9bfb9af87a..374b5992a0 100644
--- a/vector/src/main/res/values/styles_riot.xml
+++ b/vector/src/main/res/values/styles_riot.xml
@@ -11,7 +11,7 @@
     </style>
 
     <!-- toolbar styles-->
-    <style name="VectorToolbarStyle" parent="Widget.AppCompat.Toolbar">
+    <style name="VectorToolbarStyle" parent="Widget.MaterialComponents.Toolbar">
         <item name="android:background">?colorPrimary</item>
         <item name="background">?colorPrimary</item>