diff --git a/pyzebra/__init__.py b/pyzebra/__init__.py
index c29cb24..68fcdb1 100644
--- a/pyzebra/__init__.py
+++ b/pyzebra/__init__.py
@@ -1,9 +1,9 @@
 from pyzebra.anatric import *
 from pyzebra.ccl_findpeaks import ccl_findpeaks
+from pyzebra.ccl_io import export_comm, load_1D, parse_1D
 from pyzebra.fit2 import fitccl
 from pyzebra.h5 import *
-from pyzebra.ccl_io import load_1D, parse_1D, export_comm
-from pyzebra.merge_function import unified_merge
+from pyzebra.merge_function import add_dict, unified_merge
 from pyzebra.xtal import *
 
 __version__ = "0.2.0"
diff --git a/pyzebra/app/panel_param_study.py b/pyzebra/app/panel_param_study.py
index d8640cf..cf88aaa 100644
--- a/pyzebra/app/panel_param_study.py
+++ b/pyzebra/app/panel_param_study.py
@@ -132,7 +132,7 @@ def create():
                 _, ext = os.path.splitext(f_name)
                 if det_data:
                     append_data = pyzebra.parse_1D(file, ext)
-                    pyzebra.unified_merge(det_data, append_data)
+                    pyzebra.add_dict(det_data, append_data)
                 else:
                     det_data = pyzebra.parse_1D(file, ext)
 
@@ -146,7 +146,7 @@ def create():
             with io.StringIO(base64.b64decode(f_str).decode()) as file:
                 _, ext = os.path.splitext(f_name)
                 append_data = pyzebra.parse_1D(file, ext)
-                pyzebra.unified_merge(det_data, append_data)
+                pyzebra.add_dict(det_data, append_data)
 
         _init_datatable()
 
diff --git a/pyzebra/merge_function.py b/pyzebra/merge_function.py
index 250aca0..5524390 100644
--- a/pyzebra/merge_function.py
+++ b/pyzebra/merge_function.py
@@ -280,11 +280,16 @@ def add_dict(dict1, dict2):
     new_filenames = np.arange(
         max_measurement_dict1 + 1, max_measurement_dict1 + 1 + len(dict2["scan"])
     )
+
+    if dict1.get("extra_meta") is None:
+        dict1["extra_meta"] = {}
+
     new_meta_name = "meta" + str(dict2["meta"]["original_filename"])
     if new_meta_name not in dict1:
         for keys, name in zip(dict2["scan"], new_filenames):
             dict2["scan"][keys]["file_of_origin"] = str(dict2["meta"]["original_filename"])
             dict1["scan"][name] = dict2["scan"][keys]
+            dict1["extra_meta"][name] = dict2["meta"]
 
         dict1[new_meta_name] = dict2["meta"]
     else: