I am initiating an action either before or after a record is saved/updated.
It is just an action to subtract a value entered in a field in the record from a field in another table.
How do I get the value from that field so I can pass it to the action?
User enters the number 10 into the field named Quantity. The action subtracts the value in Quantity field from some other field.
So I need to get the current value in the field Quantity before the record is saved. Or immediately after, if the field values are still available before any other action deletes them.