Select "Proposal" in the top menu.
Choose the proposal you want to vote on.
Scroll down to the voting options.
If you want to vote for the proposal — click "Vote for" button. If you want to vote against — click "Vote against".
Choose the transaction processing time and click the "Vote for proposal" button.
Confirm the transaction in your wallet, pay gas fees, and wait.
Once the transaction is approved you will see that your vote was counted.