diff --git a/src/petab_gui/controllers/table_controllers.py b/src/petab_gui/controllers/table_controllers.py
index 0c99b0c..bf0b69f 100644
--- a/src/petab_gui/controllers/table_controllers.py
+++ b/src/petab_gui/controllers/table_controllers.py
@@ -1315,3 +1315,61 @@ def __init__(
             undo_stack=undo_stack,
             mother_controller=mother_controller,
         )
+
+    def setup_completers(self):
+        """Set completers for the visualization table."""
+        table_view = self.view.table_view
+        # plotTypeSimulation
+        index = self.model.return_column_index("plotTypeSimulation")
+        if index and index > -1:
+            self.completers["plotTypeSimulation"] = ComboBoxDelegate(
+                ["LinePlot", "BarPlot", "ScatterPlot"]
+            )
+            table_view.setItemDelegateForColumn(
+                index, self.completers["plotTypeSimulation"]
+            )
+        # plotTypeData
+        index = self.model.return_column_index("plotTypeData")
+        if index and index > -1:
+            self.completers["plotTypeData"] = ComboBoxDelegate(
+                ["MeanAndSD", "MeanAndSEM", "replicate", "provided"]
+            )
+            table_view.setItemDelegateForColumn(
+                index, self.completers["plotTypeData"]
+            )
+        # datasetId
+        index = self.model.return_column_index("datasetId")
+        if index and index > -1:
+            self.completers["datasetId"] = ColumnSuggestionDelegate(
+                self.mother_controller.model.measurement, "datasetId"
+            )
+            table_view.setItemDelegateForColumn(
+                index, self.completers["datasetId"]
+            )
+        # yValues
+        index = self.model.return_column_index("yValues")
+        if index and index > -1:
+            self.completers["yValues"] = ColumnSuggestionDelegate(
+                self.mother_controller.model.observable, "observableId"
+            )
+            table_view.setItemDelegateForColumn(
+                index, self.completers["yValues"]
+            )
+        # xScale
+        index = self.model.return_column_index("xScale")
+        if index and index > -1:
+            self.completers["xScale"] = ComboBoxDelegate(
+                ["lin", "log", "log10", "order"]
+            )
+            table_view.setItemDelegateForColumn(
+                index, self.completers["xScale"]
+            )
+        # yScale
+        index = self.model.return_column_index("yScale")
+        if index and index > -1:
+            self.completers["yScale"] = ComboBoxDelegate(
+                ["lin", "log", "log10", "order"]
+            )
+            table_view.setItemDelegateForColumn(
+                index, self.completers["yScale"]
+            )
diff --git a/src/petab_gui/models/pandas_table_model.py b/src/petab_gui/models/pandas_table_model.py
index 4ba208f..295f069 100644
--- a/src/petab_gui/models/pandas_table_model.py
+++ b/src/petab_gui/models/pandas_table_model.py
@@ -670,7 +670,9 @@ def return_column_index(self, column_name):
         Returns:
             int: The view column index for the given column name, or -1
         """
-        pass
+        if column_name in self._data_frame.columns:
+            return self._data_frame.columns.get_loc(column_name)
+        return -1
 
     def unique_values(self, column_name):
         """Return a list of unique values in a specified column.
@@ -1115,12 +1117,6 @@ def get_default_values(self, index, changed: dict | None = None):
         else:
             command.redo()
 
-    def return_column_index(self, column_name):
-        """Return the index of a column."""
-        if column_name in self._data_frame.columns:
-            return self._data_frame.columns.get_loc(column_name)
-        return -1
-
 
 class ObservableModel(IndexedPandasTableModel):
     """Table model for the observable data."""