Choose View > Show Attachments Browser, then click Scans or Documents. To view an attachment inside the note that contains it, select the attachment, then choose View > Show in Note.
Note: If you have macOS 10.14 or later, and iOS 12 or later or iPadOS 13 or later, you can also scan a document directly from your iPhone or iPad camera. In a note, click at the beginning of a line, choose File > Insert from iPhone or iPad, then choose Scan Documents to scan a document with your iPhone or iPad and insert it in your note. See next to the document title, then choose Markup.
See Touch Bar).
Click the Crop button on your Mac, click Show Thumbnails next to the name of the scanned document.
Control-click a thumbnail, then choose Filters.
Click the filter you want (or tap it in the on your Mac, select the PDF or scanned document in your note, then choose Edit > Rename Attachment.
Type the new name, then click Save.