Hi @EnricoG
So i can two ways how you can store column value in a variable.
First way is to store column value of a specific item which is being iterated using apply to each . So here in my list , I have a column named Event Subject, so for every iteration/item in the list item, i want to store Event Subject value in a variable so that i can use it for other purposes for other steps in my iteration. So in that case, i would design like this

Second Method: You want to store entire column values to array format , for example The same above Event Subject has values like below

I want to get in a array format like below
['sample subject','Sample Subject']
Then you should try like this:
Click the highlighted section in Select action

Then pass the event subject dynamic content like this :
