Done Bar In this presentation, a done bar replaces the action bar entirely, providing two direct actions to persist or dismiss changes. This is suitable for cases where no additional view details or actions are needed in the action bar. Done Button In this presentation, a done button replaces the action bar\'s "Up" affordance and app icon, while the cancel action is made available in the action overflow. This is well-suited to scenarios where additional view details or actions may be needed in the action bar.