Next button remains disabled despite triggers and states considered.

I usually create a custom state for clickable items if I want to control the Next button.  Whether you are jumping to a page or a layer, create a custom state for each clickable image. I named the state "Complete".

The attached file has examples of both jump to page and show layers

Jump to Slide

For each page that the image jumps to, create a True/False variable (for example, Slide_1_2). Create a trigger for each clickable image:

• Change the state of Lungs image to Complete when the timeline starts on this page IF variable Slide_1_2 is equal to TRUE

Add another trigger for the Next Button

• Change the state of the Next button to Normal when the timeline starts IF all of these variables are TRUE:
  Slide_1_2
  And Slide_1_3
  And Slide_1_3
  (etc)

Add a trigger to each Jumped to page that adjusts its variable to true. In my example, I adjusted the variable to True when the learner clicks the Back Button.

Jump to Layer

For each Layer that the image jumps to, create a True/False variable (for example, Slide_1_1_Layer_1).

On each layer, create a trigger to change the state of the clickable image on the base layer:

• Change the State of Lungs to Complete when the timeline ends (or whatever action you want)

On the base layer, create a trigger that changes the state of the Next button to Normal when the state of all the images are equal to Complete.