Find the Top-up button either in Dashboard or Manage subscription
Top-up from Dashboard
Top-up from Manage Subscription
A pop-up will appear, enter your top-up amount in the text field
You may also use the slider or pre-defined buttons that will calculate based on your account balance
Enter top-up amount
Review your top-up amount before clicking on Confirm
Confirm top-up amount
Approve the transaction in your wallet
Pending confirmation
Wait for the transaction being executed
Executing transaction
You will see a success message along with the transaction URL to Polkadot explorer
Transaction successful
Your subscription amount will be displayed as + <value> as an indicator that the top-up amount will be added to the total subscription in the next reward period