Using on W11, Quicken R62.16 I have a problem for very long time with PDF preview.
In add-transaction-attachment window adding a file as jpg I get always a nice preview in the middle. However some PDFs do not show preview, while by the View/Open command (in 3 dots) shows well the PDF in the actual PDF viewer of my PC (Acrobat and others). The PDFs having no preview are neither large, nor old version. It seems Quicken cannot handle some PDFs. The problem is I do not know which ones. For demonstration I attach 2 PDFs. 1st gives preview, while 2nd not.
[Edited - Removed Personal Information from Attachments]