diff --git a/artiq/dashboard/moninj.py b/artiq/dashboard/moninj.py
index 94fb2d0bf..e916811b5 100644
--- a/artiq/dashboard/moninj.py
+++ b/artiq/dashboard/moninj.py
@@ -868,11 +868,22 @@ class MoninjTreeWidget(pg.TreeWidget):
             return False
         return True
 
-    def add_widget(self, widget):
+    def _find_group(self, group):
+        for i in range(self.topLevelItemCount()):
+            item = self.topLevelItem(i)
+            if item.text(0) == group:
+                return item
+        return self.invisibleRootItem()
+
+    def add_widget(self, widget, group=None):
         item = pg.TreeWidgetItem()
         item.setFlags(item.flags() & ~QtCore.Qt.ItemFlag.ItemIsDropEnabled)
         self._widgets[widget.uid] = widget
-        self.addTopLevelItem(item)
+        if group is None:
+            self.addTopLevelItem(item)
+        else:
+            group_item = self._find_group(group)
+            group_item.addChild(item)
         self.setItemWidget(item, 0, widget)
 
     def _remove_item_action(self):
@@ -906,13 +917,30 @@ class MoninjTreeWidget(pg.TreeWidget):
             self.remove_widget(child)
 
     def extend(self, d):
-        pass
-
-    def clear(self):
-        pass
+        for item in d:
+            if isinstance(item, dict):
+                self.add_group(item["name"])
+                for widget in item["widgets"]:
+                    self.add_widget(widget, group=item["name"])
+            else:
+                self.add_widget(item)
 
     def export_list(self):
-        pass
+        export_list = list()
+        for i in range(self.topLevelItemCount()):
+            item = self.topLevelItem(i)
+            widget = self.itemWidget(item, 0)
+            if widget is None:
+                group = dict()
+                group["name"] = item.text(0)
+                group["widgets"] = list()
+                for j in item.childCount():
+                    child = item.child(j)
+                    widget = self.itemWidget(child, 0)
+                    group["widgets"].append(widget.uid)
+                export_list.append(group)
+            else:
+                export_list.append(widget.uid)
 
 
 class MonInjDock(QtWidgets.QDockWidget):