Does anyone know of a way to change the "next" button to an "end" button at the end of a story?

Hi Sara, you can change the text labels on the buttons by going to Player clicking on Text labels and then changing the custom text for the button. The only problem with this is that it changes every instance of the name so you can't have it say next on one slide and then end on another slide - but there is a trick you can do provided you are not using the submit button in your course.

If you are not using the submit button, you can change its name to say end and then change the trigger to exit course when the user clicks the button. If you do this make sure you hide the next button on the slide.