gtk:button-use-underline (object)

object -- a gtk:button widget
setting -- true if underlines in the text indicate mnemonics

Accessor of the use-underline slot of the gtk:button class. The gtk:button-use-underline function gets whether underlines are interpreted as mnemonics. The (setf gtk:button-use-underline) function sets whether to use underlines as mnemonics. If true, an underline in the text of the button label indicates the next character should be used for the mnemonic accelerator key.