diff --git a/docs/DataGrid.md b/docs/DataGrid.md
index e29876f..b5b9dc6 100644
--- a/docs/DataGrid.md
+++ b/docs/DataGrid.md
@@ -151,18 +151,6 @@ The DataGrid automatically detects column types from pandas dtypes:
 | `datetime64`       | Datetime      | Formatted date          |
 | `object`, others   | Text          | Left-aligned, truncated |
 
-### Row Index Column
-
-By default, the DataGrid displays a row index column on the left. This can be useful for identifying rows:
-
-```python
-# Row index is enabled by default
-grid._state.row_index = True
-
-# To disable the row index column
-grid._state.row_index = False
-grid.init_from_dataframe(df)
-```
 
 ## Column Features
 
diff --git a/src/myfasthtml/assets/datagrid/datagrid.css b/src/myfasthtml/assets/datagrid/datagrid.css
index 96dbaed..52f867d 100644
--- a/src/myfasthtml/assets/datagrid/datagrid.css
+++ b/src/myfasthtml/assets/datagrid/datagrid.css
@@ -12,7 +12,6 @@
     display: flex;
     width: 100%;
     font-size: var(--text-xl);
-    margin: 4px 0;
 }
 
 /* Body */
@@ -45,6 +44,40 @@
     user-select: none;
 }
 
+.dt2-last-cell {
+    border-right: 1px solid var(--color-border);
+}
+
+.dt2-add-column {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-bottom: 1px solid var(--color-border);
+    width: 24px;
+}
+
+.dt2-add-row {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-bottom: 1px solid var(--color-border);
+    border-right: 1px solid var(--color-border);
+    width: 24px;
+    min-width: 24px;
+    min-height: 20px;
+}
+
+
+.dt2-row-selection {
+    display: flex;
+    align-items: center;
+    justify-content: center;
+    border-bottom: 1px solid var(--color-border);
+    border-right: 1px solid var(--color-border);
+    min-width: 24px;
+    min-height: 20px;
+}
+
 /* Cell content types */
 .dt2-cell-content-text {
     text-align: inherit;
diff --git a/src/myfasthtml/controls/DataGrid.py b/src/myfasthtml/controls/DataGrid.py
index 17c2b4a..f85f617 100644
--- a/src/myfasthtml/controls/DataGrid.py
+++ b/src/myfasthtml/controls/DataGrid.py
@@ -17,14 +17,14 @@ from myfasthtml.controls.DataGridFormattingEditor import DataGridFormattingEdito
 from myfasthtml.controls.DslEditor import DslEditorConf
 from myfasthtml.controls.IconsHelper import IconsHelper
 from myfasthtml.controls.Keyboard import Keyboard
-from myfasthtml.controls.Mouse import Mouse
 from myfasthtml.controls.Panel import Panel, PanelConf
 from myfasthtml.controls.Query import Query, QUERY_FILTER
 from myfasthtml.controls.datagrid_objects import DataGridColumnState, DataGridRowState, \
   DatagridSelectionState, DataGridHeaderFooterConf, DatagridEditionState
 from myfasthtml.controls.helpers import mk, column_type_defaults
 from myfasthtml.core.commands import Command
-from myfasthtml.core.constants import ColumnType, ROW_INDEX_ID, FooterAggregation, DATAGRID_PAGE_SIZE, FILTER_INPUT_CID
+from myfasthtml.core.constants import ColumnType, ROW_INDEX_ID, FooterAggregation, DATAGRID_PAGE_SIZE, FILTER_INPUT_CID, \
+  ROW_SELECTION_ID
 from myfasthtml.core.dbmanager import DbObject
 from myfasthtml.core.dsls import DslsManager
 from myfasthtml.core.formatting.dsl.completion.FormattingCompletionEngine import FormattingCompletionEngine
@@ -36,7 +36,7 @@ from myfasthtml.core.optimized_ft import OptimizedDiv
 from myfasthtml.core.utils import make_safe_id, merge_classes, make_unique_safe_id, is_null
 from myfasthtml.icons.carbon import row, column, grid
 from myfasthtml.icons.fluent import checkbox_unchecked16_regular
-from myfasthtml.icons.fluent_p2 import checkbox_checked16_regular, column_edit20_regular
+from myfasthtml.icons.fluent_p2 import checkbox_checked16_regular, column_edit20_regular, add12_filled
 from myfasthtml.icons.fluent_p3 import text_edit_style20_regular
 
 # OPTIMIZATION: Pre-compiled regex to detect HTML special characters
@@ -70,7 +70,6 @@ class DatagridState(DbObject):
       super().__init__(owner, name=f"{owner.get_id()}#state", save_state=save_state)
       self.sidebar_visible: bool = False
       self.selected_view: str = None
-      self.row_index: bool = True
       self.columns: list[DataGridColumnState] = []
       self.rows: list[DataGridRowState] = []  # only the rows that have a specific state
       self.headers: list[DataGridHeaderFooterConf] = []
@@ -99,12 +98,14 @@ class DatagridSettings(DbObject):
       self.open_settings_visible: bool = True
       self.text_size: str = "sm"
       self.enable_formatting: bool = True
+      self.enable_edition: bool = True
 
 
 class DatagridStore(DbObject):
   """
   Store Dataframes
   """
+  
   def __init__(self, owner, save_state):
     with self.initializing():
       super().__init__(owner, name=f"{owner.get_id()}#df", save_state=save_state)
@@ -140,14 +141,14 @@ class Commands(BaseCommands):
                    self._owner,
                    self._owner.move_column
                    ).htmx(target=None)
-
+  
   def reset_column_width(self):
     return Command("ResetColumnWidth",
                    "Auto-size column to fit content",
                    self._owner,
                    self._owner.reset_column_width
                    ).htmx(target=f"#th_{self._id}")
-
+  
   def filter(self):
     return Command("Filter",
                    "Filter Grid",
@@ -187,16 +188,35 @@ class Commands(BaseCommands):
     return Command("ToggleColumnsManager",
                    "Hide/Show Columns Manager",
                    self._owner,
-                   self._owner.toggle_columns_manager
+                   self._owner.handle_toggle_columns_manager
+                   ).htmx(target=None)
+  
+  def toggle_new_column_editor(self):
+    return Command("ToggleNewColumnEditor",
+                   "Add New Column",
+                   self._owner,
+                   self._owner.handle_toggle_new_column_editor,
+                   icon=add12_filled,
                    ).htmx(target=None)
   
   def toggle_formatting_editor(self):
     return Command("ToggleFormattingEditor",
                    "Hide/Show Formatting Editor",
                    self._owner,
-                   self._owner.toggle_formatting_editor
+                   self._owner.handle_toggle_formatting_editor
                    ).htmx(target=None)
   
+  def add_row(self):
+    return Command("AddRow",
+                   "Add row",
+                   self._owner,
+                   self._owner.handle_add_row,
+                   icon=add12_filled,
+                   ).htmx(target=f"#tr_{self._id}-last",
+                          swap="outerHTML",
+                          auto_swap_oob=False
+                          )
+  
   def on_column_changed(self):
     return Command("OnColumnChanged",
                    "Column definition changed",
@@ -213,6 +233,7 @@ class DataGrid(MultipleInstance):
     self._state = DatagridState(self, save_state=self._settings.save_state)
     self._df_store = DatagridStore(self, save_state=self._settings.save_state)
     self._formatting_engine = FormattingEngine()
+    self._columns = None
     self.commands = Commands(self)
     self.init_from_dataframe(self._df_store.ne_df, init_state=False)  # data comes from DatagridStore
     
@@ -220,6 +241,7 @@ class DataGrid(MultipleInstance):
     self._panel = Panel(self, conf=PanelConf(show_display_right=False), _id="-panel")
     self._panel.set_side_visible("right", False)  # the right Panel always starts closed
     self.bind_command("ToggleColumnsManager", self._panel.commands.toggle_side("right"))
+    self.bind_command("ToggleNewColumnEditor", self._panel.commands.set_side_visible("right", True))
     self.bind_command("ToggleFormattingEditor", self._panel.commands.toggle_side("right"))
     
     # add Query
@@ -421,6 +443,14 @@ class DataGrid(MultipleInstance):
     # Get global tables formatting from manager
     return self._parent.all_tables_formats
   
+  def _init_columns(self):
+    self._columns = self._state.columns.copy()
+    if self._settings.enable_edition:
+      self._columns.insert(0, DataGridColumnState(ROW_SELECTION_ID,
+                                                  -1,
+                                                  "",
+                                                  ColumnType.RowSelection_))
+  
   def init_from_dataframe(self, df, init_state=True):
     
     def _get_column_type(dtype):
@@ -441,8 +471,6 @@ class DataGrid(MultipleInstance):
                                      col_id,
                                      _get_column_type(self._df[make_safe_id(col_id)].dtype))
                  for col_index, col_id in enumerate(_df.columns)]
-      if self._state.row_index:
-        columns.insert(0, DataGridColumnState(make_safe_id(ROW_INDEX_ID), -1, " ", ColumnType.RowIndex))
       
       return columns
     
@@ -494,6 +522,8 @@ class DataGrid(MultipleInstance):
         self._df_store.save()
         self._state.rows = []  # sparse: only rows with non-default state are stored
         self._state.columns = _init_columns(df)  # use df not self._df to keep the original title
+      
+      self._init_columns()
       self._df_store.ns_fast_access = _init_fast_access(self._df)
       self._df_store.ns_row_data = _init_row_data(self._df)
       self._df_store.ns_total_rows = len(self._df) if self._df is not None else 0
@@ -532,15 +562,75 @@ class DataGrid(MultipleInstance):
         row_dict[col_def.col_id] = default_value
       self._df_store.save()
   
-  def handle_set_column_width(self, col_id: str, width: str):
-    """Update column width after resize. Called via Command from JS."""
-    logger.debug(f"set_column_width: {col_id=} {width=}")
-    for col in self._state.columns:
-      if col.col_id == col_id:
-        col.width = int(width)
-        break
+  def add_new_row(self, row_data: dict = None) -> None:
+    """Add a new row to the DataGrid with incremental updates.
+
+    Creates default values based on column types and handles formula columns.
+    Updates ns_fast_access and ns_row_data incrementally for better performance.
+
+    Args:
+        row_data: Optional dict with initial values. If None, uses type defaults.
+    """
+    import numpy as np
     
-    self._state.save()
+    def _get_default_value(col_def: DataGridColumnState):
+      """Get default value for a column based on its type."""
+      if col_def.type == ColumnType.Formula:
+        return None  # Will be calculated by FormulaEngine
+      return column_type_defaults.get(col_def.type, "")
+    
+    if row_data is None:
+      # Create default values for all non-formula, non-selection columns
+      row_data = {}
+      for col in self._state.columns:
+        if col.type not in (ColumnType.Formula, ColumnType.RowSelection_):
+          row_data[col.col_id] = _get_default_value(col)
+    
+    # 1. Add row to DataFrame (only non-formula columns)
+    new_index = len(self._df)
+    self._df.loc[new_index] = row_data
+    
+    # 2. Incremental update of ns_fast_access
+    for col_id, value in row_data.items():
+      if col_id in self._df_store.ns_fast_access:
+        self._df_store.ns_fast_access[col_id] = np.append(
+          self._df_store.ns_fast_access[col_id],
+          value
+        )
+      else:
+        # First value for this column (rare case)
+        self._df_store.ns_fast_access[col_id] = np.array([value])
+    
+    # Update row index
+    if ROW_INDEX_ID in self._df_store.ns_fast_access:
+      self._df_store.ns_fast_access[ROW_INDEX_ID] = np.append(
+        self._df_store.ns_fast_access[ROW_INDEX_ID],
+        new_index
+      )
+    else:
+      self._df_store.ns_fast_access[ROW_INDEX_ID] = np.array([new_index])
+    
+    # 3. Incremental update of ns_row_data
+    self._df_store.ns_row_data.append(row_data.copy())
+    
+    # 4. Handle formula columns
+    engine = self.get_formula_engine()
+    if engine is not None:
+      table_name = self.get_table_name()
+      # Check if there are any formula columns
+      has_formulas = any(col.type == ColumnType.Formula for col in self._state.columns)
+      if has_formulas:
+        try:
+          # Recalculate all formulas (engine handles efficiency)
+          engine.recalculate_if_needed(table_name, self._df_store)
+        except Exception as e:
+          logger.warning(f"Failed to calculate formulas for new row: {e}")
+    
+    # 5. Update total row count
+    self._df_store.ns_total_rows = len(self._df)
+    
+    # Save changes
+    self._df_store.save()
   
   def move_column(self, source_col_id: str, target_col_id: str):
     """Move column to new position. Called via Command from JS."""
@@ -569,9 +659,10 @@ class DataGrid(MultipleInstance):
       self._state.columns.insert(target_idx, col)
     else:
       self._state.columns.insert(target_idx, col)
+    self._init_columns()
     
     self._state.save()
-
+  
   def calculate_optimal_column_width(self, col_id: str) -> int:
     """
     Calculate optimal width for a column based on content.
@@ -589,24 +680,24 @@ class DataGrid(MultipleInstance):
     if not col_def:
       logger.warning(f"calculate_optimal_column_width: column not found {col_id=}")
       return 150  # default width
-
+    
     # Title length
     title_length = len(col_def.title)
-
+    
     # Max data length
     max_data_length = 0
     if col_id in self._df_store.ns_fast_access:
       col_array = self._df_store.ns_fast_access[col_id]
       if col_array is not None and len(col_array) > 0:
         max_data_length = max(len(str(v)) for v in col_array)
-
+    
     # Calculate width (8px per char + 30px padding)
     max_length = max(title_length, max_data_length)
     optimal_width = max_length * 8 + 30
-
+    
     # Apply limits (50px min, 500px max)
     return max(50, min(optimal_width, 500))
-
+  
   def reset_column_width(self, col_id: str):
     """
     Auto-size column to fit content. Called via Command from JS double-click.
@@ -622,18 +713,18 @@ class DataGrid(MultipleInstance):
     """
     logger.debug(f"reset_column_width: {col_id=}")
     optimal_width = self.calculate_optimal_column_width(col_id)
-
+    
     # Update and persist
     for col in self._state.columns:
       if col.col_id == col_id:
         col.width = optimal_width
         break
-
+    
     self._state.save()
-
+    
     # Return updated header with script to update body cells via after-settle
     return self.render_partial("header", col_id=col_id, optimal_width=optimal_width)
-
+  
   def filter(self):
     logger.debug("filter")
     self._state.filtered[FILTER_INPUT_CID] = self._datagrid_filter.get_query()
@@ -688,16 +779,46 @@ class DataGrid(MultipleInstance):
     self._state.save()
     return self.render_partial()
   
-  def toggle_columns_manager(self):
+  def handle_toggle_columns_manager(self):
     logger.debug(f"toggle_columns_manager")
     self._panel.set_title(side="right", title="Columns")
+    self._columns_manager.adding_new_column = False
+    self._columns_manager.set_all_columns(True)
+    self._columns_manager.unbind_command(("ShowAllColumns", "SaveColumnDetails"))
     self._panel.set_right(self._columns_manager)
   
-  def toggle_formatting_editor(self):
+  def handle_toggle_new_column_editor(self):
+    logger.debug(f"handle_toggle_new_column_editor")
+    self._panel.set_title(side="right", title="Columns")
+    self._columns_manager.adding_new_column = True
+    self._columns_manager.set_all_columns(False)
+    self._columns_manager.bind_command(("ShowAllColumns", "SaveColumnDetails"),
+                                       self._panel.commands.set_side_visible("right", False))
+    self._panel.set_right(self._columns_manager)
+  
+  def handle_toggle_formatting_editor(self):
     logger.debug(f"toggle_formatting_editor")
     self._panel.set_title(side="right", title="Formatting")
     self._panel.set_right(self._formatting_editor)
   
+  def handle_set_column_width(self, col_id: str, width: str):
+    """Update column width after resize. Called via Command from JS."""
+    logger.debug(f"set_column_width: {col_id=} {width=}")
+    for col in self._state.columns:
+      if col.col_id == col_id:
+        col.width = int(width)
+        break
+    
+    self._state.save()
+  
+  def handle_add_row(self):
+    self.add_new_row()  # Add row to data
+    row_index = len(self._df) - 1  # Index of the newly added row
+    len_columns_1 = len(self._columns) - 1
+    rows = [self.mk_row(row_index, None, len_columns_1)]
+    self._mk_append_add_row_if_needed(rows)
+    return rows
+  
   def save_state(self):
     self._state.save()
   
@@ -721,7 +842,7 @@ class DataGrid(MultipleInstance):
     resize_cmd = self.commands.set_column_width()
     move_cmd = self.commands.move_column()
     reset_cmd = self.commands.reset_column_width()
-
+    
     def _mk_header_name(col_def: DataGridColumnState):
       return Div(
         mk.label(col_def.title, icon=IconsHelper.get(col_def.type)),
@@ -729,11 +850,14 @@ class DataGrid(MultipleInstance):
         cls="flex truncate cursor-default",
         data_tooltip=col_def.title,
       )
-
+    
     def _mk_header(col_def: DataGridColumnState):
       if not col_def.visible:
         return None
-
+      
+      if col_def.type == ColumnType.RowSelection_:
+        return Div(cls="dt2-row-selection")
+      
       return Div(
         _mk_header_name(col_def),
         Div(cls="dt2-resize-handle", data_command_id=resize_cmd.id, data_reset_command_id=reset_cmd.id),
@@ -744,8 +868,13 @@ class DataGrid(MultipleInstance):
       )
     
     header_class = "dt2-header"
+    header_columns = [_mk_header(col_def) for col_def in self._columns]
+    if self._settings.enable_edition:
+      header_columns.append(Div(
+        mk.icon(command=self.commands.toggle_new_column_editor(), size=16),
+        cls="dt2-add-column"))
     return Div(
-      *[_mk_header(col_def) for col_def in self._state.columns],
+      *header_columns,
       cls=header_class,
       id=f"th_{self._id}",
       data_move_command_id=move_cmd.id
@@ -841,7 +970,7 @@ class DataGrid(MultipleInstance):
     else:
       return mk_highlighted_text(value_str, merge_classes("dt2-cell-content-text", cls), css_string)
   
-  def mk_body_cell(self, col_pos, row_index, col_def: DataGridColumnState, filter_keyword_lower=None):
+  def mk_body_cell(self, col_pos, row_index, col_def: DataGridColumnState, filter_keyword_lower, is_last):
     """
     OPTIMIZED: Accepts pre-computed filter_keyword_lower to avoid repeated dict lookups.
     OPTIMIZED: Uses OptimizedDiv instead of Div for faster rendering.
@@ -849,6 +978,9 @@ class DataGrid(MultipleInstance):
     if not col_def.visible:
       return None
     
+    if col_def.type == ColumnType.RowSelection_:
+      return OptimizedDiv(cls="dt2-row-selection")
+    
     col_array = self._df_store.ns_fast_access.get(col_def.col_id)
     value = col_array[row_index] if col_array is not None and row_index < len(col_array) else None
     content = self.mk_body_cell_content(col_pos, row_index, col_def, filter_keyword_lower)
@@ -858,7 +990,23 @@ class DataGrid(MultipleInstance):
                         data_tooltip=str(value),
                         style=f"width:{col_def.width}px;",
                         id=self._get_element_id_from_pos("cell", (col_pos, row_index)),
-                        cls="dt2-cell")
+                        cls=merge_classes("dt2-cell", "dt2-last-cell" if is_last else None))
+  
+  def mk_row(self, row_index, filter_keyword_lower, len_columns_1):
+    return OptimizedDiv(
+      *[self.mk_body_cell(col_pos, row_index, col_def, filter_keyword_lower, col_pos == len_columns_1)
+        for col_pos, col_def in enumerate(self._columns)],
+      cls="dt2-row",
+      data_row=f"{row_index}",
+      id=f"tr_{self._id}-{row_index}",
+    )
+  
+  def _mk_append_add_row_if_needed(self, rows):
+    if self._settings.enable_edition:
+      rows.append(Div(
+        mk.icon(command=self.commands.add_row(), size=16),
+        cls="dt2-add-row",
+        id=f"tr_{self._id}-last"))
   
   def mk_body_content_page(self, page_index: int):
     """
@@ -872,22 +1020,16 @@ class DataGrid(MultipleInstance):
     
     start = page_index * DATAGRID_PAGE_SIZE
     end = start + DATAGRID_PAGE_SIZE
-    if self._df_store.ns_total_rows > end:
-      last_row = df.index[end - 1]
-    else:
-      last_row = None
     
     filter_keyword = self._state.filtered.get(FILTER_INPUT_CID)
     filter_keyword_lower = filter_keyword.lower() if filter_keyword else None
+    len_columns_1 = len(self._columns) - 1
     
-    rows = [OptimizedDiv(
-      *[self.mk_body_cell(col_pos, row_index, col_def, filter_keyword_lower)
-        for col_pos, col_def in enumerate(self._state.columns)],
-      cls="dt2-row",
-      data_row=f"{row_index}",
-      id=f"tr_{self._id}-{row_index}",
-      **self.commands.get_page(page_index + 1).get_htmx_params(escaped=True) if row_index == last_row else {}
-    ) for row_index in df.index[start:end]]
+    rows = [self.mk_row(row_index, filter_keyword_lower, len_columns_1) for row_index in df.index[start:end]]
+    if self._df_store.ns_total_rows > end:
+      rows[-1].attrs.extend(self.commands.get_page(page_index + 1).get_htmx_params(escaped=True))
+    
+    self._mk_append_add_row_if_needed(rows)
     
     return rows
   
@@ -907,7 +1049,7 @@ class DataGrid(MultipleInstance):
   def mk_footers(self):
     return Div(
       *[Div(
-        *[self.mk_aggregation_cell(col_def, row_index, footer) for col_def in self._state.columns],
+        *[self.mk_aggregation_cell(col_def, row_index, footer) for col_def in self._columns],
         id=f"tf_{self._id}",
         data_row=f"{row_index}",
         cls="dt2-row dt2-row-footer",
@@ -1059,7 +1201,7 @@ class DataGrid(MultipleInstance):
           cls="flex items-center justify-between mb-2"),
       self._panel.set_main(self.mk_table_wrapper()),
       Script(f"initDataGrid('{self._id}');"),
-      Mouse(self, combinations=self._mouse_support, _id="-mouse"),
+      # Mouse(self, combinations=self._mouse_support, _id="-mouse"),
       Keyboard(self, combinations=self._key_support, _id="-keyboard"),
       id=self._id,
       cls="grid",
@@ -1074,35 +1216,35 @@ class DataGrid(MultipleInstance):
     :return:
     """
     res = []
-
+    
     extra_attr = {
         "hx-on::after-settle": f"initDataGrid('{self._id}');",
     }
-
+    
     if fragment == "body":
       body_container = self.mk_body_wrapper()
       body_container.attrs.update(extra_attr)
       res.append(body_container)
-
+    
     elif fragment == "table":
       table = self.mk_table()
       table.attrs.update(extra_attr)
       res.append(table)
-
+    
     elif fragment == "header":
       col_id = kwargs.get("col_id")
       optimal_width = kwargs.get("optimal_width")
-
+      
       header_extra_attr = {
           "hx-on::after-settle": f"setColumnWidth('{self._id}', '{col_id}', '{optimal_width}');",
       }
-
+      
       header = self.mk_headers()
       header.attrs.update(header_extra_attr)
       return header
-
+    
     res.append(self.mk_selection_manager())
-
+    
     return tuple(res)
   
   def dispose(self):
diff --git a/src/myfasthtml/controls/DataGridColumnsManager.py b/src/myfasthtml/controls/DataGridColumnsManager.py
index b2797ff..fdf63f8 100644
--- a/src/myfasthtml/controls/DataGridColumnsManager.py
+++ b/src/myfasthtml/controls/DataGridColumnsManager.py
@@ -10,7 +10,7 @@ from myfasthtml.controls.Search import Search
 from myfasthtml.controls.datagrid_objects import DataGridColumnState
 from myfasthtml.controls.helpers import mk
 from myfasthtml.core.commands import Command
-from myfasthtml.core.constants import ColumnType
+from myfasthtml.core.constants import ColumnType, get_columns_types
 from myfasthtml.core.dsls import DslsManager
 from myfasthtml.core.formula.dsl.completion.FormulaCompletionEngine import FormulaCompletionEngine
 from myfasthtml.core.formula.dsl.parser import FormulaParser
@@ -39,21 +39,21 @@ class Commands(BaseCommands):
     return Command(f"ShowAllColumns",
                    f"Show all columns",
                    self._owner,
-                   self._owner.show_all_columns).htmx(target=f"#{self._id}", swap="innerHTML")
+                   self._owner.handle_show_all_columns).htmx(target=f"#{self._id}", swap="innerHTML")
   
   def save_column_details(self, col_id):
     return Command(f"SaveColumnDetails",
                    f"Save column {col_id}",
                    self._owner,
-                   self._owner.save_column_details,
+                   self._owner.handle_save_column_details,
                    kwargs={"col_id": col_id}
                    ).htmx(target=f"#{self._id}", swap="innerHTML")
   
-  def on_new_column(self):
-    return Command(f"OnNewColumn",
-                   f"New column",
+  def add_new_column(self):
+    return Command(f"AddNewColumn",
+                   f"Add a new column",
                    self._owner,
-                   self._owner.on_new_column).htmx(target=f"#{self._id}", swap="innerHTML")
+                   self._owner.handle_add_new_column).htmx(target=f"#{self._id}", swap="innerHTML")
   
   def on_column_type_changed(self):
     return Command(f"OnColumnTypeChanged",
@@ -66,7 +66,8 @@ class DataGridColumnsManager(MultipleInstance):
   def __init__(self, parent, _id=None):
     super().__init__(parent, _id=_id)
     self.commands = Commands(self)
-    self._new_column = False
+    self.adding_new_column = False
+    self._all_columns = True  # Do not return to all_columns after column details
     
     completion_engine = FormulaCompletionEngine(
       self._parent._parent,
@@ -109,6 +110,9 @@ class DataGridColumnsManager(MultipleInstance):
     
     return col_def
   
+  def set_all_columns(self, all_columns):
+    self._all_columns = all_columns
+  
   def toggle_column(self, col_id):
     logger.debug(f"toggle_column {col_id=}")
     col_def = self._get_col_def_from_col_id(col_id, copy=False)
@@ -129,22 +133,24 @@ class DataGridColumnsManager(MultipleInstance):
     
     return self.mk_column_details(col_def)
   
-  def show_all_columns(self):
-    return self._mk_inner_content()
+  def handle_show_all_columns(self):
+    self.adding_new_column = False
+    return self._mk_inner_content() if self._all_columns else None
   
-  def save_column_details(self, col_id, client_response):
+  def handle_save_column_details(self, col_id, client_response):
     logger.debug(f"save_column_details {col_id=}, {client_response=}")
     col_def = self._get_updated_col_def_from_col_id(col_id, client_response, copy=False)
     if col_def.col_id == "__new__":
       self._parent.add_new_column(col_def)  # sets the correct col_id before _register_formula
+      self.adding_new_column = False
     self._register_formula(col_def)
     self._parent.save_state()
     
-    return self._mk_inner_content()
+    return self._mk_inner_content() if self._all_columns else None
   
-  def on_new_column(self):
-    self._new_column = True
-    col_def = self._get_updated_col_def_from_col_id("__new__")
+  def handle_add_new_column(self):
+    self.adding_new_column = True
+    col_def = DataGridColumnState("__new__", -1)
     return self.mk_column_details(col_def)
   
   def on_column_type_changed(self, col_id, client_response):
@@ -192,6 +198,7 @@ class DataGridColumnsManager(MultipleInstance):
   
   def mk_column_details(self, col_def: DataGridColumnState):
     size = "sm"
+    
     return Div(
       mk.label("Back", icon=chevron_left20_regular, command=self.commands.show_all_columns()),
       Form(
@@ -210,7 +217,9 @@ class DataGridColumnsManager(MultipleInstance):
           Label("type"),
           mk.mk(
             Select(
-              *[Option(option.value, value=option.value, selected=option == col_def.type) for option in ColumnType],
+              *[Option(option.value,
+                       value=option.value,
+                       selected=option == col_def.type) for option in get_columns_types()],
               name="type",
               cls=f"select select-{size}",
               value=col_def.title,
@@ -260,11 +269,15 @@ class DataGridColumnsManager(MultipleInstance):
   
   def mk_new_column(self):
     return Div(
-      mk.button("New Column", command=self.commands.on_new_column()),
+      mk.button("New Column", command=self.commands.add_new_column()),
       cls="mb-1",
     )
   
   def _mk_inner_content(self):
+    if self.adding_new_column:
+      col_def = DataGridColumnState("__new__", -1)
+      return self.mk_column_details(col_def)
+    
     return (self.mk_all_columns(),
             self.mk_new_column())
   
diff --git a/src/myfasthtml/controls/IconsHelper.py b/src/myfasthtml/controls/IconsHelper.py
index c517ff7..3d5d382 100644
--- a/src/myfasthtml/controls/IconsHelper.py
+++ b/src/myfasthtml/controls/IconsHelper.py
@@ -1,3 +1,5 @@
+from fastcore.basics import NotStr
+
 from myfasthtml.core.constants import ColumnType
 from myfasthtml.icons.fluent import question20_regular, brain_circuit20_regular, number_symbol20_regular, \
   number_row20_regular
@@ -13,7 +15,7 @@ default_icons = {
     False: checkbox_unchecked20_regular,
     
     "Brain": brain_circuit20_regular,
-    "QuestionMark" : question20_regular,
+    "QuestionMark": question20_regular,
     
     # TreeView icons
     "TreeViewFolder": folder20_regular,
@@ -46,6 +48,9 @@ class IconsHelper:
     :return: The requested icon resource if found; otherwise, returns None.
     :rtype: object or None
     """
+    if isinstance(name, NotStr):
+      return name
+    
     if name in IconsHelper._icons:
       return IconsHelper._icons[name]
     
diff --git a/src/myfasthtml/controls/Menu.py b/src/myfasthtml/controls/Menu.py
index 7e020ce..9b99108 100644
--- a/src/myfasthtml/controls/Menu.py
+++ b/src/myfasthtml/controls/Menu.py
@@ -43,6 +43,9 @@ class Menu(MultipleInstance):
     }
   
   def _mk_menu(self, command_name):
+    if not isinstance(command_name, str):
+      return command_name
+    
     command = self.usable_commands.get(command_name)
     return mk.icon(command.icon or IconsHelper.get("QuestionMark"),
                    command=command,
diff --git a/src/myfasthtml/controls/Panel.py b/src/myfasthtml/controls/Panel.py
index 15566df..4207572 100644
--- a/src/myfasthtml/controls/Panel.py
+++ b/src/myfasthtml/controls/Panel.py
@@ -64,8 +64,8 @@ class PanelState(DbObject):
 
 class Commands(BaseCommands):
   def set_side_visible(self, side: Literal["left", "right"], visible: bool = None):
-    return Command("TogglePanelSide",
-                   f"Toggle {side} side panel",
+    return Command("SetVisiblePanelSide",
+                   f"Open / Close {side} side panel",
                    self._owner,
                    self._owner.set_side_visible,
                    args=[side, visible]).htmx(target=f"#{self._owner.get_ids().panel(side)}")
diff --git a/src/myfasthtml/core/commands.py b/src/myfasthtml/core/commands.py
index 7f6fe40..26e2a9e 100644
--- a/src/myfasthtml/core/commands.py
+++ b/src/myfasthtml/core/commands.py
@@ -151,7 +151,7 @@ class Command:
         before_commands = [bc for bc in self.owner.get_bound_commands(self.name) if bc.when == "before"]
         for bound_cmd in before_commands:
           logger.debug(f"  will execute bound command {bound_cmd.command.name} BEFORE...")
-          r = bound_cmd.command.execute()  # client_response should not be forwarded as it's not the same command
+          r = bound_cmd.command.execute(client_response)
           ret_from_before_commands.append(r)
       
       # Execute main callback
@@ -166,7 +166,7 @@ class Command:
         after_commands = [bc for bc in self.owner.get_bound_commands(self.name) if bc.when == "after"]
         for bound_cmd in after_commands:
           logger.debug(f"  will execute bound command {bound_cmd.command.name} AFTER...")
-          r = bound_cmd.command.execute()  # client_response should not be forwarded as it's not the same command
+          r = bound_cmd.command.execute(client_response)
           ret_from_after_commands.append(r)
     
     all_ret = flatten(ret, ret_from_before_commands, ret_from_after_commands, collector.results)
diff --git a/src/myfasthtml/core/constants.py b/src/myfasthtml/core/constants.py
index 5eede34..cde3cba 100644
--- a/src/myfasthtml/core/constants.py
+++ b/src/myfasthtml/core/constants.py
@@ -6,6 +6,7 @@ ROUTE_ROOT = "/myfasthtml"
 
 # Datagrid
 ROW_INDEX_ID = "__row_index__"
+ROW_SELECTION_ID = "__row_selection__"
 DATAGRID_DEFAULT_COLUMN_WIDTH = 100
 DATAGRID_PAGE_SIZE = 1000
 FILTER_INPUT_CID = "__filter_input__"
@@ -19,6 +20,7 @@ class Routes:
 
 
 class ColumnType(Enum):
+  RowSelection_ = "RowSelection_"
   RowIndex = "RowIndex"
   Text = "Text"
   Number = "Number"
@@ -29,6 +31,10 @@ class ColumnType(Enum):
   Formula = "Formula"
 
 
+def get_columns_types() -> list[ColumnType]:
+  return [c for c in ColumnType if not c.value.endswith("_")]
+
+
 class ViewType(Enum):
   Table = "Table"
   Chart = "Chart"
diff --git a/src/myfasthtml/core/instances.py b/src/myfasthtml/core/instances.py
index eecd92a..30c1d06 100644
--- a/src/myfasthtml/core/instances.py
+++ b/src/myfasthtml/core/instances.py
@@ -1,9 +1,9 @@
 import logging
 import uuid
-from typing import Optional
+from typing import Optional, Literal
 
 from myfasthtml.controls.helpers import Ids
-from myfasthtml.core.commands import BoundCommand
+from myfasthtml.core.commands import BoundCommand, Command
 from myfasthtml.core.constants import NO_DEFAULT_VALUE
 from myfasthtml.core.utils import pascal_to_snake, get_class, snake_to_pascal
 
@@ -113,7 +113,10 @@ class BaseInstance:
     parent = self.get_parent()
     return parent.get_full_id() if parent else None
   
-  def bind_command(self, command, command_to_bind, when="after"):
+  def bind_command(self,
+                   command: Command | str | tuple | list,
+                   command_to_bind,
+                   when: Literal["before", "after"] = "after"):
     """
     Bind a command to another command.
 
@@ -126,18 +129,28 @@ class BaseInstance:
         Duplicate bindings are automatically prevented using two mechanisms:
         1. Check if the same binding already exists
     """
-    command_name = command.name if hasattr(command, "name") else command
-
-    # Protection 1: Check if this binding already exists to prevent duplicates
-    existing_bindings = self._bound_commands.get(command_name, [])
-    for existing in existing_bindings:
-      if existing.command.name == command_to_bind.name and existing.when == when:
-        # Binding already exists, don't add it again
-        return
-
-    # Add new binding
-    bound = BoundCommand(command=command_to_bind, when=when)
-    self._bound_commands.setdefault(command_name, []).append(bound)
+    
+    def _bind(_command_name, _command_to_bind, _when):
+      # Check if this binding already exists to prevent duplicates
+      existing_bindings = self._bound_commands.get(_command_name, [])
+      for existing in existing_bindings:
+        if existing.command.name == _command_to_bind.name and existing.when == _when:
+          return  # Binding already exists, don't add it again
+      
+      # Add new binding
+      bound = BoundCommand(command=_command_to_bind, when=_when)
+      self._bound_commands.setdefault(command_name, []).append(bound)
+    
+    commands = [command] if isinstance(command, (str, Command)) else command
+    for c in commands:
+      command_name = c.name if hasattr(c, "name") else c
+      _bind(c, command_to_bind, when)
+  
+  def unbind_command(self, command: Command | str | tuple | list):
+    commands = [command] if isinstance(command, (str, Command)) else command
+    for c in commands:
+      command_name = c.name if hasattr(c, "name") else c
+      self._bound_commands.pop(command_name, None)
   
   def get_bound_commands(self, command_name):
     return self._bound_commands.get(command_name, [])