To lock $BOND tokens, you should deposit them to the platform. (How to deposit $BOND tokens?)
Click on the "Wallet" and go to the "Lock" tab.
Select the lock duration with the predefined options or enter it manually (min - 1 week, max - 1 year).
Choose the transaction processing time and hit the "Lock" button.
Confirm the transaction in your wallet, pay gas fees and wait.
Congrats! You got your vBOND bonus.