What security settings can I control through this new feature? 

With this new security feature, you’ll be able to customize your debit card settings from online banking and the mobile app, including the ability to: 
•    Temporarily lock your debit cards to prevent all future transactions.
•    Lock Point-of-Sale transactions to restrict all transactions within Canada, including refunds. 
•    Restrict all Point-of-Sale transactions outside of Canada, including refunds.
•    Restrict all ATM withdrawals performed within Canada.
•    Restrict all ATM withdrawals performed outside Canada.
•    Set ATM and POS "per-transaction" limits for withdrawals and purchases.