API Reference > ui-ninezone ui-ninezone Change Log The ui-ninezone package contains React components for application user interface layouts following the Bentley 9-Zone pattern. For more information, see learning about ui-ninezone. Topics Name Description Backstage Classes for working with a Backstage Footer Classes for working with a Footer or Status Bar Message Classes for working with Messages MessageCenter Classes for working with the MessageCenter Popup Classes for working with a Popup SnapMode Classes for working with SnapMode UI StagePanels Classes for working with stage panels ToolAssistance Classes for working with Tool Assistance Toolbar Classes for working with a Toolbar ToolSettings Classes for working with Tool Settings Utilities Utility classes for working with the 9-Zone pattern Widget Classes for working a Widget Zone Classes for working a Zone All Displays the contents of all topics in this package. Last Updated: 15 June, 2021