Is there a player setting so that a page doesn't count as viewed until the time line reaches the end?

As far as I know, a slide is considered as viewed as soon as you jump on it. It does not matter if the timeline reached the end of the slide or not, or if there are more layers with additional content to view on the same slide. It's the default behavior. "The Next button will automatically enable once the timeline/seekbar reaches the end of the slide." Yes, by default, unless you have a trigger to change its state to Normal by any action that will execute before or after the timeline reaches the end of the slide. For instance, a slide with more buttons where each button shows additional layer. You would have to create a trigger "Change state of the next button to Normal if the state of all buttons (which show additional layers) are visited" to make sure that all slide content is viewed before you allow the learner to proceed to the next slide. So far, I found no way to jump ahead through the menu as long as the slide tab appears locked.