Condition "if item" is on another layer
I have a slide with 3 layers. Each layer has 5 items for people to pick from. On the top layer is a submit button and I want a variable to count how many items a learner clicked on. When creating the trigger to add to a variable (under the condition that items are selected), I can choose items from the same layer and the base layer, but not from the other two layers. Any way for me to add a condition for an item that's neither on the base, nor on the same layer?