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, enter a name, select a file format, then choose where you want to save it.
Click Save.
To save a file using a different filename, press and hold the Option key, then choose File > Save As.
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.