In order to ring up an item to the ticket, you can simply select the item from the sales screen.
FD:Main Screen > Log-in > Map Screen > Select Table > Sales Screen
QSR: Main Screen > Log-in > Sales Screen
Select the category to bring up the item customer wants and ring up the item.
Result
Item ring-up will show on left side, on the ticket. Press SEND to send the orders to the kitchen.