Use case or problem
In reading mode, images and PDFs can’t be opened in an external editor. To do so, one must switch to Preview, make the link text visible, and then right click and choose “Open in default app”.
Proposed solution
For images, I propose a contextual menu that allows users to right-click and then select “Open in default app”.
For PDFs, it might make more sense to add “Open in default app” to the ⋮ menu in the top right. Alternatively, an “Open” button might be added to the “Download” and “Print” buttons.
Current workaround (optional)
As mentioned above, one can switch to Preview, make the link text visible, and then right click and choose “Open in default app”.