![](https://help.apple.com/assets/6532FAB79D2139AC34081679/6532FABB9D2139AC3408167F/en_GB/530c85a3f10678e47ca4a56f0a580b22.png)
Combine PDFs in Preview on Mac
Combine all or part of two or more PDFs into a single PDF.
WARNING: Changes you make to a Preview document are saved automatically. If you want to keep the original PDFs (in addition to the new combined one), choose File > Duplicate to create a copy of each PDF before combining them.
![A page thumbnail copied from one PDF to the sidebar of another.](https://help.apple.com/assets/6532FAB79D2139AC34081679/6532FABB9D2139AC3408167F/en_GB/8b28d10e64143ad424026a8b780ed6ca.png)
In the Preview app
on your Mac, open the PDFs you want to combine.
In each open PDF, choose View > Thumbnails to display the page thumbnails in the sidebar.
Drag the thumbnails you want to add to the thumbnail sidebar in the other PDF. Command-click to select non-adjacent thumbnails.
You can add pages to the end of the document or between pages in a document. Drag thumbnails to reorder them.
Tip: To add an entire PDF to the beginning or end of another PDF, drag the PDF icon in the Finder to the sidebar of an open document.