The public Coviewer shows every folio of Beinecke MS 408, one or two at a time, with zoom, pan and marks that travel in the link. It needs no account and stores nothing in your browser. The same viewer sits beside the records on the research board.
Every folio of Beinecke MS 408, f1r to f116v, from the Beinecke Library digital images, as 204 sheets; a foldout is one sheet, so f72r1 opens on the f71v-72r sheet. The binding views and the full-resolution images are at the Beinecke digital collection, linked from the viewer.
One or two panes; zoom and pan; five kinds of mark (arrow, box, pen, pin, note). Marks live in the link or in a notes file you save, never on a server.
Public research titles and statuses are on the research board, which mounts the same viewer beside the records.