sidebar
The sidebar is the area to the right of your spreadsheet that shows either the Format inspector or the Organise controls.
Format: Click in the toolbar to show formatting controls for whatever is selected in the spreadsheet, like a table, graph, text or a shape. Click the tabs at the top of the sidebar to see more controls.
Organise: Click in the toolbar to show controls for creating sorting rule, filtering and categories for the spreadsheet.
If a sidebar is open and you click its icon in the toolbar, the sidebar closes.