Next button to appear after all layers have been viewed?

Hi Melissa!

I'm happy to help! I appreciate you sharing your file.

Here are the changes I've made:

• Set all layers to Pause timeline of base layer
• Added a trigger to Change the state of the Next Button to Normal when the Timeline Starts if All of the rectangles are Visited

I'm attaching the updated file to this reply. Let me know if you have any questions!