Sets the tooltip markup text to be used as tooltip for the arrow button which pops up the menu. See gtk_tool_item_set_tooltip_text() for setting a tooltip on the whole #GtkMenuToolButton.
markup text to be used as tooltip text for button’s arrow button
2.12
See Implementation
Sets the tooltip markup text to be used as tooltip for the arrow button which pops up the menu. See gtk_tool_item_set_tooltip_text() for setting a tooltip on the whole #GtkMenuToolButton.