follow these steps:
- To do so, select your PDF, then 'File,' then 'Duplicate' from the drop-down menu.
- Open the preview window.
- Select one of the PDFs you wish to combine and open it. In this tutorial, we'll combine two of them.
- Click 'View' in your PDF file.
- Then, in the sidebar, click 'Thumbnail' to see thumbnails.
- In Preview, drag another PDF from your desktop. The two documents will be combined as a result of this.
- You can put them in whatever sequence you like, including in front of, behind, or between existing pages. Rearrange the thumbnails by dragging them.
