Currently we use a custom solution for our clients to do this.What you could do using just Lectora's built in stuff, is to create a group of buttoms that mimics the dropdown menu. Then you add a variable to each section of the menu. This variable will change based upon if they have been to the section, or not.Add actions to the buttons that check the variables to see if they have been to the section. If they have not, don't activate the button.
