Save PDFs and images in Preview on Mac
Preview automatically saves changes for you as you work, but you can also save a document manually. When you edit a file, Preview saves a version at least every hour (more often if you’re making significant changes). Preview also saves a version when you open a document, save or duplicate a document, lock or rename a document, or revert to a previous version.
In the Preview app
on your Mac, open a PDF or image.Choose File > Save.
To save a file using a different filename, press and hold the Option key, choose File > Save As, then enter a name. Choose where you want to save the file, select a file format, then click Save.
If you have iCloud set up and iCloud Drive turned on, you can save your documents in the Preview folder in iCloud Drive by clicking the Where pop-up menu, choosing “Preview — iCloud,” then clicking Save. See Use iCloud Drive to store documents.
Tip: You can also hold the pointer over the document title and click the arrow to save the document or change its location.