Hey @blazarsoftware,
I’ll assume you have categories stored in an Option Set. On the page or group where you need multiple selection, add a state that will be of type Option Set Categories, and this state will be a list.
On category card click, check if the state contains the current category or not, and run an action to either remove the category from selected categories or add the category to the list of selected categories. You need these to be separate actions. So:
- Card is clicked and this state contains this category
- Card is clicked and this state doesn’t contain this category
Hope this helps. Let me know if you need any other assistance.
Artem