If the ordered items are passed to a kitchen for processing and the customer will not get a bill until later because he is sitting at a table waiting for his meal, then you need to identify the order with the customer probably by using a table number.
Enter a reference code such as a table number into the box labelled Reference.

Now push the Preview button. A list of the items ordered will appear over the main body of the screen allowing you to confirm what has been ordered.

If you have a printer in the kitchen (the Orders printer) then pushing the Print button will print this order in the kitchen.
If you dont have an Orders printer and just need to store this order until the customer is ready for the final bill, then the Preview screen will show the green button as Record rather than Print so push the Record button to record that order in the database.

If the customer subsequently orders dessert start a new order by pushing the New button then enter the table reference number in the reference box and process this new order.
At some later time the customer will require a bill or receipt. At that time push the New button on the order screen, enter the table reference number then push the Recall button. The order screen will fill all the items the customer has ordered as may be seen by pushing the Preview button.

Close the preview by clicking on the preview pane and print the bill or receipt as before by selecting Bill only, Cash or Card and the pushing the Print button.