You can purchase and manage the following passes:
You can only purchase the Tarjeta Plus 10 Student Card at the ticket office but you can manage your trips from the "Abonos" (Passes)
Yes, you need to be a registered customer to purchase a pass.
Once you have purchased your pass, you need to indicate which day and train you want to travel on. This is what we call "validating" a trip. You can do this by accessing Mis abonos (My passes) and selecting the Nueva formalización (New validation) option.
If you change your mind and do not want to make that trip, click on the cancellation icon to cancel it and prevent this trip from being validated in your pass. This is what we call "validation cancellation".