How to merge files into one PDF:
- Within Acrobat XI, select File > Create > Combine Files into a Single PDF.
- Click Add Files and select the files you want to add.
- Click, drag, and drop to reorder the files and pages. Double-click on a file to expand and rearrange individual pages. Press the Delete key to remove unwanted content.
- When finished arranging the files, click Combine Files.
- Select File > Save As > PDF.
- Name your PDF file and click Save.