Reenabling a disabled Next button

The Next button does change to Normal when the two buttons are Visited. There's a glimpse of that before the program jumps to another slide.

However, when the user returns to slide 4.4, the trigger to disable Next runs again: 

To keep Next enabled, you need to add conditions to that trigger. The easiest is to check that the buttons do not equal (≠ ) Visited.

• Yes, use "≠ Visited" (not "= Normal"). Every built-in state has Normal within it, so using a condition of "=Normal" often causes problems.
• Note that the conditions are connected with "or" (not "and"). This means the trigger will run if either condition is met. 

By the way, when a custom menu slide such as 4.4 jumps to other slides, consider using variables to track whether the user has completed the slides/sections that the buttons jump to. Otherwise, when you just rely on the buttons being Visited, the user could jump to a slide and immediately click PREV to return to the custom menu. 

• Here's more info about what I mean: TIP: Create a Custom Menu Slide - Articulate Storyline Discussions - E-Learning Heroes