You can use page thumbnails to copy or move pages within a document and between documents.
When you drag a page thumbnail in a Pages panel, a bar appears near other thumbnails, indicating the position in which it will appear in the PDF. This bar appears at the bottom or top when the thumbnails are in a single column, or to the left or right if more than one column of thumbnails is displayed.
Move or copy a page within a PDF, using page thumbnailsTo move a page, drag the page number box of the corresponding page thumbnail or the page thumbnail itself to the new location. A bar appears to show the new position of the page thumbnail. The pages are renumbered.
To copy a page, Ctrl-drag/Option-drag the page thumbnail to a second location.
Move or copy a page between two PDFs, using page thumbnailsTo copy a page, drag the page thumbnail into the Pages panel of the target PDF. The page is copied into the document, and the pages are renumbered.
To remove a page from one PDF and insert it into another PDF, select the page thumbnail and Ctrl-drag/Option-drag it into the Pages panel of the target PDF. The page is inserted into the target document and deleted from the source document. The pages are renumbered.