diff --git a/app/ptxboa_functions.py b/app/ptxboa_functions.py
index be83a048..1daf65ab 100644
--- a/app/ptxboa_functions.py
+++ b/app/ptxboa_functions.py
@@ -526,7 +526,8 @@ def content_market_scanning(
 
     # show data in tabular form:
     st.markdown("**Data:**")
-    st.dataframe(df_plot, use_container_width=True)
+    column_config = config_number_columns(df_plot, format="%.1f")
+    st.dataframe(df_plot, use_container_width=True, column_config=column_config)
 
 
 def remove_subregions(api: PtxboaAPI, df: pd.DataFrame, settings: dict):
@@ -616,7 +617,11 @@ def content_costs_by_region(
         create_bar_chart_costs(df_res)
 
     st.write("**Data:**")
-    st.dataframe(df_res, use_container_width=True)
+
+    column_config = config_number_columns(
+        df_res, format=f"%.1f {settings['output_unit']}"
+    )
+    st.dataframe(df_res, use_container_width=True, column_config=column_config)
 
 
 def content_deep_dive_countries(
@@ -684,6 +689,7 @@ def content_deep_dive_countries(
             "Wind-PV-Hybrid",
         ]
         x = "process_code"
+        column_config = {"format": "%.0f h/a", "min_value": 0, "max_value": 8760}
 
     if data_selection == "total costs":
         df = res_costs.copy()
@@ -702,6 +708,7 @@ def content_deep_dive_countries(
             source_region_code=region_list,
             parameter_code=parameter_code,
             process_code=process_code,
+            column_config=column_config,
             key_suffix="_ddc",
         )
     with c1:
@@ -764,6 +771,8 @@ def content_input_data(api: PtxboaAPI, settings: dict) -> None:
             "Wind-PV-Hybrid",
         ]
         x = "process_code"
+        column_config = {"format": "%.0f USD/kW", "min_value": 0}
+
     if data_selection == "full load hours":
         parameter_code = ["full load hours"]
         process_code = [
@@ -773,10 +782,13 @@ def content_input_data(api: PtxboaAPI, settings: dict) -> None:
             "Wind-PV-Hybrid",
         ]
         x = "process_code"
+        column_config = {"format": "%.0f h/a", "min_value": 0, "max_value": 8760}
+
     if data_selection == "interest rate":
         parameter_code = ["interest rate"]
         process_code = [""]
         x = "parameter_code"
+        column_config = {"format": "%.3f", "min_value": 0, "max_value": 1}
 
     c1, c2 = st.columns(2, gap="medium")
     with c2:
@@ -788,7 +800,9 @@ def content_input_data(api: PtxboaAPI, settings: dict) -> None:
             source_region_code=region_list_without_subregions,
             parameter_code=parameter_code,
             process_code=process_code,
+            column_config=column_config,
         )
+
     with c1:
         # create plot:
         st.markdown("**Figure:**")
@@ -809,7 +823,7 @@ def display_user_changes():
     """Display input data changes made by user."""
     if "user_changes_df" in st.session_state.keys():
         st.write("**Input data has been modified:**")
-        st.write(st.session_state["user_changes_df"])
+        st.dataframe(st.session_state["user_changes_df"].style.format(precision=3))
 
 
 def display_and_edit_data_table(
@@ -820,6 +834,7 @@ def display_and_edit_data_table(
     index: str = "source_region_code",
     columns: str = "process_code",
     values: str = "value",
+    column_config: dict = None,
     key_suffix: str = "",
 ) -> pd.DataFrame:
     """Display selected input data as 2D table, which can also be edited."""
@@ -829,19 +844,31 @@ def display_and_edit_data_table(
     df = input_data.loc[ind1 & ind2 & ind3]
     df_tab = df.pivot_table(index=index, columns=columns, values=values, aggfunc="sum")
 
+    # if editing is enabled, store modifications in session_state:
     if st.session_state["edit_input_data"]:
         disabled = [index]
         key = f"edit_input_data_{parameter_code}{key_suffix}"
     else:
         disabled = True
         key = None
+
+    # configure columns for display:
+    if column_config is None:
+        column_config_all = None
+    else:
+        column_config_all = config_number_columns(df_tab, **column_config)
+
+    # display data:
     st.data_editor(
         df_tab,
         use_container_width=True,
         key=key,
         num_rows="fixed",
         disabled=disabled,
+        column_config=column_config_all,
     )
+    if st.session_state["edit_input_data"]:
+        st.markdown("You can edit data directly in the table!")
 
     # store changes in session_state:
     if st.session_state["edit_input_data"]:
@@ -1246,3 +1273,14 @@ def content_disclaimer():
         )
     st.image("static/disclaimer.png")
     st.image("static/disclaimer_2.png")
+
+
+def config_number_columns(df: pd.DataFrame, **kwargs) -> {}:
+    """Create number column config info for st.dataframe() or st.data_editor."""
+    column_config_all = {}
+    for c in df.columns:
+        column_config_all[c] = st.column_config.NumberColumn(
+            **kwargs,
+        )
+
+    return column_config_all