https://x.thunkable.com/copy/d411219c2c6b1bf92e22c4ebfe23845f
How to construct a blocks so when i click an object in the list, it will change to the other screen and shows the object detail i set on the database, thank you
Hello @samyt3475q 
I think I understand the feature you need.
When you click on an item inside the data viewer list you get the row ID of that as I am doing here:
(The set variable needs to be made before you navigate to the next screen)
Hello, thank you very much, it’s working, but now i want to update the stored data by click it on the item, directed to page form, and update the quantity, what blocks should i contruct?