You can use page thumbnails in the Navigation pane or the Document area to copy or move pages within a document and to copy pages between documents.
Move or copy a page within a PDF, using page thumbnails Steps:
Open the PDF in Acrobat DC, and then choose Tools > Organize Pages or choose Organize Pages from the right pane.
The Organize Pages toolset is displayed in the secondary toolbar and the page thumbnails are displayed in the Document area. The Document area changes to display page thumbnails. Select one or more page thumbnails. Do one of the following: To 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 cut or copy a page, right-click and choose Cut or Copy. Click between the page thumbnails where you want to paste the page. A blue horizontal marker shows the selected location where you want to paste. Right-click and choose Paste. You can paste the pages in another PDF as well. Right click and copy the page
You can also perform the above operations in the left navigation pane by clicking the Page Thumbnails button.
Copy a page between two PDFs, using page thumbnails Steps:
Open both PDFs, and display them side by side.
Choose Window > Tile > Vertically to display the PDFs side by side.
Open the Page Thumbnails panels for both PDFs. Alternatively, go to Tools > Organize Pages on both the PDFs.
Click the Page Thumbnails button in the left navigation pane to open the Page Thumbnail panel.
Select the page you want to cut or copy. If you want to select more than one page, press Ctrl and then select the pages. Right-click the page thumbnail, and select Copy.
Right click and copy the page In the page thumbnails of the target PDF, click between the page thumbnails where you want to paste the page. A blue horizontal marker shows the selected location where you want to paste. Right-click and choose Paste. The page is copied into the document, and the pages are renumbered. You can paste the pages in another PDF as well.
Alternatively, you can also drag the page thumbnail into the Page Thumbnails panel of the target PDF.