Hide Next button until objects have been visited

No worries, Brian. Thanks for sharing the details of what you see now. We can look at these one at a time:

1. Exit button that is supposed to appear after all the others are visited.
   I'd first recommend adjusting the 'When' on your trigger to when the timeline starts on this slide:
   
   Also, you have the variable set to adjust on the states of the text boxes, but there are no states on these items. The states, still no visited state, are listed on the Rounded Rectangle Shapes. So, the variable is not adjusting, which is why you do not see the Exit button.
   
   
   
2. The disabled next button on the steps slides is no longer working when all of the scenes are gathered together in a larger file.
   It looks like it's working on the slide we worked on together, which is Slide 3.7 in your project:
   
   Are you referring to the next slide, 3.8?
   
   I can see that you're using the same variable, which is why the Next button is displaying. You adjusted the variable on the previous slide. You will need a different variable for additional slides.

This should get everything working as expected.