sidebar
The sidebar is the area to the right of your document where you can choose settings for the document or the currently selected text or object. The sidebar is visible only when the Format or Document button is selected in the toolbar.
When the Format button is selected, the sidebar shows controls for formatting whatever is selected in the document. For example, if text is selected, you see controls for changing the font, text size, or style. Only in a page layout document, if nothing is selected, the sidebar shows page layout controls.
When the Document button is selected, the sidebar shows controls for formatting the document, such as the page orientation and header and footer positions.