It depends on the journey and the option you chose when booking, for example a visit to the Royal Yacht Britannia or a day at leisure in Edinburgh. Your journey page sets out the plan, and your travel documents confirm the timings.
Before we arrive, our team will brief you on board: where any included transfer leaves from, where to meet, and the time to be back at the train. Please keep to that time, as the train runs to a Network Rail path and can't wait. Free time depends on the confirmed timings, so check your travel documents rather than the website.
Lunch and afternoon tea journeys don't stop; see How long is a journey, and where does it finish?
Related: Are entry tickets and transfers included? · What if an attraction is closed on the day?