Bouton présent sur chaque diapositive d'une même séquence

Bonjour, Fabienne, and welcome to E-Learning Heroes! ✨

If I understand correctly, you'd like to add a custom Previous button to multiple slides in your project.

The best way to accomplish this is by using a Slide Master. You can add the button with the corresponding trigger to a layout, which can be re-used throughout your course.

Take a look at this article for additional information:

• Storyline 360 - How to use slide masters

Let me know if you have additional questions!