diff --git a/local/recipes/tui/tlc/source/src/editor/menubar.rs b/local/recipes/tui/tlc/source/src/editor/menubar.rs
index ebfe52884c..739988dfd6 100644
--- a/local/recipes/tui/tlc/source/src/editor/menubar.rs
+++ b/local/recipes/tui/tlc/source/src/editor/menubar.rs
@@ -93,6 +93,8 @@ pub enum EditorCmd {
     ToggleOverwrite,
     /// Delete character/selection (MC CK_Remove).
     Delete,
+    /// Toggle column/stream selection mode (MC CK_Mark).
+    ToggleColumnMode,
 }
 
 /// Outcome of a menu-bar key press.
@@ -220,6 +222,7 @@ impl EditorMenuBar {
                     MenuItem::item("Delete", 'd', EditorCmd::Delete),
                     MenuItem::separator(),
                     MenuItem::item("Select all", 'a', EditorCmd::MarkAll),
+                    MenuItem::item("Toggle column", 't', EditorCmd::ToggleColumnMode),
                 ],
             ),
             Menu::new(
diff --git a/local/recipes/tui/tlc/source/src/editor/mod.rs b/local/recipes/tui/tlc/source/src/editor/mod.rs
index 83baeff090..b3ec1c6f6e 100644
--- a/local/recipes/tui/tlc/source/src/editor/mod.rs
+++ b/local/recipes/tui/tlc/source/src/editor/mod.rs
@@ -1310,6 +1310,15 @@ impl Editor {
                     self.message = Some("Block copied".to_string());
                 }
             }
+            EditorCmd::ToggleColumnMode => {
+                if self.cursor.selection_mode() == crate::editor::cursor::SelectionMode::Column {
+                    self.cursor.clear_selection();
+                    self.message = Some("Stream selection".to_string());
+                } else {
+                    self.cursor.start_column_selection();
+                    self.message = Some("Column selection".to_string());
+                }
+            }
             EditorCmd::Delete => {
                 if self.cursor.has_selection() {
                     self.cursor.delete_selection(&mut self.buffer);