question on a layer

You can't convert the individual layer into a freeform question because when a slide is converted to a freeform question it builds the quizzing logic/structure to include layers.

In your example, I'd recommend using individual slides if you want to track the questions. The end user wouldn't know that they're jumping to slides and not layers.

Create a main slide that allows them to access the questions. Trigger to a question slide rather than a layer. Convert those slides to freeform. Trigger back to the main slide to select other questions.

Hi, Faffie.

Thank you for sharing your .story file!

In addition to what Tom suggested, you can also Lightbox that new question slide from your main one:

• How to Create Lightboxes in Storyline 360 and Storyline 3

I hope this helps!

Yeah, the lightbox would be a good option.