Yes, you can modify or cancel your bond orders before they are matched.

To Amend an Order:

1. Go to: Bonds > Order Book
2. Select the order > Click Modify under "More Actions"
3. Adjust the price (increase or decrease) or reduce the quantity
4. Enter your password to confirm the changes

To Cancel an Order:

1. Go to: Bonds > Order Book
2. Select the order > Click Cancel under "More Actions"

Note: If you change the price, your order loses its original priority in the queue.