diff --git a/lib/ui/dialogs/screen_dialog.dart b/lib/ui/dialogs/screen_dialog.dart
new file mode 100644
index 0000000..c44f13a
--- /dev/null
+++ b/lib/ui/dialogs/screen_dialog.dart
@@ -0,0 +1,43 @@
+import 'dart:math';
+
+import 'package:comunic/utils/ui_utils.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+/// Screen dialog
+///
+/// @author Pierre Hubert
+
+/// Show a screen dialog
+///
+/// This widget automatically adapt himself if we are in tablet
+/// or in mobile mode
+Future<T> showScreenDialog<T>(BuildContext context, Widget screen) async {
+  // TODO : add mobile support
+  if (!isTablet(context)) throw Exception("Unsupported mode!");
+
+  return await showDialog(
+      context: context, builder: (c) => _ScreenDialog(body: screen));
+}
+
+class _ScreenDialog extends StatelessWidget {
+  final Widget body;
+
+  const _ScreenDialog({Key key, this.body}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    final size = MediaQuery.of(context).size;
+    final width = min(500.0, size.width - 50);
+    final height = min(800.0, size.height - 50);
+
+    return AlertDialog(
+      contentPadding: EdgeInsets.all(0.0),
+      content: Container(
+        width: width,
+        height: height,
+        child: body,
+      ),
+    );
+  }
+}
diff --git a/lib/ui/widgets/tablet_mode/conversations/conversation_window.dart b/lib/ui/widgets/tablet_mode/conversations/conversation_window.dart
index a289bf8..7269b22 100644
--- a/lib/ui/widgets/tablet_mode/conversations/conversation_window.dart
+++ b/lib/ui/widgets/tablet_mode/conversations/conversation_window.dart
@@ -1,7 +1,9 @@
 import 'package:comunic/helpers/conversations_helper.dart';
 import 'package:comunic/helpers/events_helper.dart';
 import 'package:comunic/models/conversation.dart';
+import 'package:comunic/ui/dialogs/screen_dialog.dart';
 import 'package:comunic/ui/screens/conversation_screen.dart';
+import 'package:comunic/ui/screens/user_page_screen.dart';
 import 'package:comunic/ui/widgets/safe_state.dart';
 import 'package:comunic/ui/widgets/tablet_mode/conversations/conversation_window_container.dart';
 import 'package:comunic/utils/account_utils.dart';
@@ -13,6 +15,8 @@ import 'package:flutter/material.dart';
 ///
 /// @author Pierre Hubert
 
+enum _Actions { OPEN_MEMBERS }
+
 class ConversationWindow extends StatefulWidget {
   final int convID;
   final Function() onClose;
@@ -119,10 +123,35 @@ class _ConversationWindowState extends SafeState<ConversationWindow> {
       onClose: widget.onClose,
       onToggleCollapse: _toggleVisibility,
       isCollapsed: _collapsed,
+      action: <Widget>[
+        PopupMenuButton<_Actions>(
+          itemBuilder: (c) => [
+            // Show the list of members
+            PopupMenuItem(
+              child: Text(tr("Members")),
+              value: _Actions.OPEN_MEMBERS,
+            )
+          ],
+          onSelected: _menuCallback,
+        ),
+      ],
       body: ConversationScreen(
         key: _convKey,
         conversationID: _convID,
       ),
     );
   }
+
+  void _menuCallback(_Actions value) {
+    switch (value) {
+      case _Actions.OPEN_MEMBERS:
+        _openMembersList();
+        break;
+    }
+  }
+
+  void _openMembersList() {
+    // dummy test
+    showScreenDialog(context, UserPageScreen(userID: 1));
+  }
 }
diff --git a/lib/ui/widgets/tablet_mode/conversations/conversation_window_container.dart b/lib/ui/widgets/tablet_mode/conversations/conversation_window_container.dart
index 3dcf755..246feff 100644
--- a/lib/ui/widgets/tablet_mode/conversations/conversation_window_container.dart
+++ b/lib/ui/widgets/tablet_mode/conversations/conversation_window_container.dart
@@ -14,6 +14,7 @@ class ConversationWindowContainer extends StatelessWidget {
   final void Function() onToggleCollapse;
   final bool isCollapsed;
   final Widget body;
+  final List<Widget> action;
 
   const ConversationWindowContainer({
     Key key,
@@ -24,6 +25,7 @@ class ConversationWindowContainer extends StatelessWidget {
     @required this.body,
     @required this.onToggleCollapse,
     @required this.isCollapsed,
+    this.action,
   })  : assert(title != null),
         assert(onClose != null),
         assert(body != null),
@@ -42,9 +44,10 @@ class ConversationWindowContainer extends StatelessWidget {
             backgroundColor: appBarBgColor,
             leading: icon,
             title: GestureDetector(child: title, onTap: onToggleCollapse),
-            actions: <Widget>[
-              IconButton(icon: Icon(Icons.close), onPressed: onClose),
-            ],
+            actions: (action == null ? [] : action)
+              ..add(
+                IconButton(icon: Icon(Icons.close), onPressed: onClose),
+              ),
           ),
           body: Visibility(
             child: body,