How to replace a page in a PDF

Open the Organize Pages toolset

• 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.
  
  
  
• In the secondary toolbar, click Replace.
  The Select Files With New Pages dialogue box appears.
  
• Select the document containing the replacement pages, and click Open.
  
  
  
• Under Original, enter the pages to be replaced in the original document.
• Under Replacement, enter the first page of the replacement page range. The last page is calculated based on the number of pages to be replaced in the original document.
• Click OK.