diff --git a/pyzebra/app/panel_param_study.py b/pyzebra/app/panel_param_study.py
index 0a0c551..fc919c6 100644
--- a/pyzebra/app/panel_param_study.py
+++ b/pyzebra/app/panel_param_study.py
@@ -84,9 +84,20 @@ def create():
 
     def _init_datatable():
         scan_list = list(det_data["scan"].keys())
+        file_list = []
+        extra_meta = det_data.get("extra_meta", {})
+        for scan_id in scan_list:
+            if scan_id in extra_meta:
+                f_path = extra_meta[scan_id]["original_filename"]
+            else:
+                f_path = det_data["meta"]["original_filename"]
+
+            _, f_name = os.path.split(f_path)
+            file_list.append(f_name)
+
         scan_table_source.data.update(
-            # file=list(det_data.keys()),
-            file=scan_list,
+            file=file_list,
+            scan=scan_list,
             param=[""] * len(scan_list),
             peaks=[0] * len(scan_list),
             fit=[0] * len(scan_list),
@@ -261,19 +272,20 @@ def create():
             # skip unnecessary update caused by selection drop
             return
 
-        _update_plot(det_data["scan"][scan_table_source.data["file"][new[0]]])
+        _update_plot(det_data["scan"][scan_table_source.data["scan"][new[0]]])
 
-    scan_table_source = ColumnDataSource(dict(file=[], param=[], peaks=[], fit=[], export=[]))
+    scan_table_source = ColumnDataSource(dict(file=[], scan=[], param=[], peaks=[], fit=[], export=[]))
     scan_table = DataTable(
         source=scan_table_source,
         columns=[
             TableColumn(field="file", title="file", width=150),
+            TableColumn(field="scan", title="scan", width=50),
             TableColumn(field="param", title="param", width=50),
             TableColumn(field="peaks", title="Peaks", width=50),
             TableColumn(field="fit", title="Fit", width=50),
             TableColumn(field="export", title="Export", editor=CheckboxEditor(), width=50),
         ],
-        width=350,
+        width=400,
         index_position=None,
         editable=True,
         fit_columns=False,
@@ -283,7 +295,7 @@ def create():
 
     def _get_selected_scan():
         selected_index = scan_table_source.selected.indices[0]
-        selected_scan_id = scan_table_source.data["file"][selected_index]
+        selected_scan_id = scan_table_source.data["scan"][selected_index]
         return det_data["scan"][selected_scan_id]
 
     def peak_pos_textinput_callback(_attr, _old, new):
@@ -499,7 +511,7 @@ def create():
         with tempfile.TemporaryDirectory() as temp_dir:
             temp_file = temp_dir + "/temp"
             export_data = deepcopy(det_data)
-            for s, export in zip(scan_table_source.data["file"], scan_table_source.data["export"]):
+            for s, export in zip(scan_table_source.data["scan"], scan_table_source.data["export"]):
                 if not export:
                     del export_data["scan"][s]
             pyzebra.export_comm(export_data, temp_file, lorentz=lorentz_toggle.active)
@@ -519,7 +531,7 @@ def create():
         with tempfile.TemporaryDirectory() as temp_dir:
             temp_file = temp_dir + "/temp"
             export_data = deepcopy(det_data)
-            for s, export in zip(scan_table_source.data["file"], scan_table_source.data["export"]):
+            for s, export in zip(scan_table_source.data["scan"], scan_table_source.data["export"]):
                 if not export:
                     del export_data["scan"][s]
             pyzebra.export_comm(export_data, temp_file, lorentz=lorentz_toggle.active)
diff --git a/pyzebra/merge_function.py b/pyzebra/merge_function.py
index 5cad2b5..250aca0 100644
--- a/pyzebra/merge_function.py
+++ b/pyzebra/merge_function.py
@@ -175,6 +175,9 @@ def merge_dups(dictionary, angles):
 def add_scan(dict1, dict2, scan_to_add):
     max_scan = np.max(list(dict1["scan"]))
     dict1["scan"][max_scan + 1] = dict2["scan"][scan_to_add]
+    if dict1.get("extra_meta") is None:
+        dict1["extra_meta"] = {}
+    dict1["extra_meta"][max_scan + 1] = dict2["meta"]
     del dict2["scan"][scan_to_add]
 
 
@@ -220,7 +223,7 @@ def process(dict1, dict2, angles, precision):
 """
     1. check for bisecting or normal beam geometry in data files; select stt, om, chi, phi for bisecting; select stt, om, nu for normal beam
     2. in the ccl files, check for identical stt, chi and nu within 0.1 degree, and, at the same time, for identical om and phi within 0.05 degree;
-    3. in the dat files, check for identical stt, chi and nu within 0.1 degree, and, at the same time, 
+    3. in the dat files, check for identical stt, chi and nu within 0.1 degree, and, at the same time,
     for identical phi within 0.05 degree, and, at the same time, for identical om within 5 degree."""