This button is to enter gratuity to the order. If the order is already paid online, mostly gratuity is
included. User can add gratuity on order page before printing out a customer receipt if payment and/or split payment are not made to the order; otherwise, user have to enter gratuity on order payment instead.

Adjust Gratuity in “Miscellaneous” page

Click “Misc” button, miscellaneous page will open

Adjust Gratuity in “PAY” page