You can use the Pages panel to freely arrange, duplicate, and recombine pages and spreads. Keep the following guidelines in mind when adding, arranging, duplicating, or removing pages:
InDesign preserves the threads between text frames.
InDesign redistributes pages according to how the Allow Document Pages To Shuffle command is set.
Objects that span multiple pages stay with the page on which they cover the most area.
In the Pages panel, drag a page icon to a new position within the document.
Drag the page range numbers under a spread to the New Page button. The new spread appears at the end of the document.
Select a page or spread, and then choose Duplicate Page or Duplicate Spread in the Pages panel menu. The new page or spread appears at the end of the document.
Press Alt (Windows) or Option (Mac OS) as you drag the page icon or page range numbers under a spread to a new location.
In the Pages panel, drag one or more page icons or page-range numbers to the Delete icon.
Select one or more page icons in the Pages panel, and click the Delete icon.
Select one or more page icons in the Pages panel, and then choose Delete Page(s) or Delete Spread(s) in the Pages panel menu.