I encountered a bug that permanently compromises the logbook. The dictionary no longer scrolls, restricting access to only the first four items, and the gallery has disappeared entirely.
That should be intentional. The gallery will not be available until you go through the first day, or meeting Leo. While playing, there will be a hover notification similar to adding details to the dictionary to say "Leo has been added to the Log Book", which means you unlocked the gallery and biography.
- Roda -
Ah... oh, I think I know what happened now. After playing through the game the first time I used the new game option on the main menu, but ultimately moved over to a save file at the first point the story can diverge. Creating a new game would have removed the button, and since I didn't meet Leo before switching to the saved game, I never got the option back. Gonna go check and see...
(Edit) That fixed it, alright. Thanks.