What is the purpose of the pay out feature on the main screen?

This feature would most commonly be used if you had to send an employee out for something. When they come back with a receipt you give them money out of the drawer and create the General Payout for that amount. A receipt will remind you that the payout will not affect your cashier out money count. In contrast,  the Manager Payout function alows for removal of money from the drawer to, lets say, put in the company safe. A receipt will print to remind you to include the money on your cashier out money count.