Description A GtkMenuToolButton is a GtkToolItem that contains a button and a small additional button with an arrow. When clicked, the arrow button pops up a dropdown menu. Use gtk_menu_tool_button_new() to create a new GtkMenuToolButton. Use gtk_menu_tool_button_new_from_stock() to create a new GtkMenuToolButton containing a stock item. GtkMenuToolButton as GtkBuildable The GtkMenuToolButton implementation of the GtkBuildable interface supports adding a menu by specifying "menu" as the "type" attribute of a <child> element.