Opening a shared Proton Doc – In the web UI (https://drive.proton.me), locate the shared document, double‑click the title or the blue Doc icon (or select the file and press Enter/right‑click → “Open in Docs”). This opens the file directly in the Proton Docs viewer. The three‑dot menu only offers download, details, copy, or remove; it does not contain the “open” command. Adding this step‑by‑step tip will help free‑account users who see only the three‑dot menu and prevent confusion.