diff --git a/invesalius/data/visualization/mep_visualizer.py b/invesalius/data/visualization/mep_visualizer.py
index 0b38596c3..aa25a3b8a 100644
--- a/invesalius/data/visualization/mep_visualizer.py
+++ b/invesalius/data/visualization/mep_visualizer.py
@@ -262,6 +262,7 @@ def _FilterMarkers(self, markers_list):
         for marker in markers_list:
             markers.append(marker.to_dict())
 
+        # TODO: use modified markers list to make projection_on_surface
         # Find objects in the new list that are not in the old list (added)
         added_objects = [
             new_obj