gtk:menu-button-use-underline (object)

object -- a gtk:menu-button widget
setting -- a boolean whether underlines in the text indicates mnemonics

Accessor of the use-underline slot of the gtk:menu-button class. The gtk:menu-button-use-underline function returns whether an embedded underline in the text indicates a mnemonic. The (setf gtk:menu-button-use-underline) function sets the property.