If you set the Tip Percentage value to a number greater than zero, the cardholder will be prompted to select your preset Tip or enter another amount (in percentage or dollars) during Purchase transactions. If you set the Tip Percentage value to zero, there will be no option for the cardholder to select a preset Tip during Purchase transactions; however, the cardholder will still be prompted to choose whether to enter a Tip (in percentage or dollars).