def clear_cycle_mrkrs(self, test=False):
        """Remove all cycle markers."""
        if not test:
            msgBox = QMessageBox(QMessageBox.Question, 'Clear Cycle Markers',
                                 'Are you sure you want to remove all cycle '
                                 'markers for this rater?')
            msgBox.setStandardButtons(QMessageBox.Yes | QMessageBox.No)
            msgBox.setDefaultButton(QMessageBox.Yes)
            response = msgBox.exec_()

            if response == QMessageBox.No:
                return

        self.annot.clear_cycles()

        self.parent.overview.display()
        self.parent.overview.display_annotations()
Remove all cycle markers.