Example:
Collateral 15,000 ICX
Loan 3,750 bnUSD
After rebalancing:
15,392 ICX
4,300 bnUSD
Press the button:
Sells 392 ICX
Repays 550 bnUSD
so it resets to the original values.
While this can be done manually, it’s not very user friendly, so a single button would be ideal for newbies.