Sorry, I didn’t keep a copy. I think there were two included walking tours and two optional tours to choose from on transfer day. No problem booking, just stop at Guest Services. We chose an optional tour to Murano/Burano, very good.
On our other days in Venice we did an included walking tour, “Highlights of St Mark’s Square”, and an optional tour to the Doge’s Palace. We booked these during the regular excursion booking process prior to boarding.
The issue with Venice is that you are docked 90 minutes from St. Mark’s Square. You’re spending 3 hours in transit (by boat) each day which limits the time you can actually spend sightseeing. Just something to keep in mind.