Prevent Paypal Refund Error

Sometimes I send partial refunds through PayPal for work. PayPal's refund page defaults to the full purchase amount in the "refund amount" field. Last year I accidentally refunded the full amount, and lost $100 to an unscrupulous buyer who wouldn't return the money. I made this macro to prevent that from happening again. If there is a more efficient or elegant way to accomplish this please let me know. Thanks!

Paypal Refund.kmmacros (2.4 KB)