Hi Damien,
Thanks for reaching out.
Dynamic Content can't list the collections themselves — the Collection Index addon always lists the items inside one collection. So the way to build your mockup is to make each Sujet an item instead of a collection:
- Create one collection called Sujets with an Image field, a Date/Time field, and a Number field for Nombre de projets. Add one item per sujet.
- On your page, add the Collection Index addon, select Sujets, and set Layout → Grid with your columns and gaps.
- Inside the item template, use Dynamic Image for the picture and Dynamic Text for the date, title and project number.
- Link each card to the sujet's Collection Details page, or to a project list filtered with the Collection Filter addon.
If your projects live in their own collection, a Multi-Reference field on Sujets keeps the relation clean — but the count still has to be entered manually, as there's no automatic "count linked items" option yet. Let me know if you'd like that, and I'll pass it to our development team as a feature request.
Docs: https://www.joomshaper.com/documentation/sp-page-builder/collection-index
Hope this helps!
Best regards,