Everything you can do to an order as a whole, rather than to one item on it.

Order level actions

• Cancel order.
• Capture customer information.
• Change order destination.
• Order level comments, plus edit and delete.
• Park order, save order and suspend order. Three different ways of setting an order aside. Learn which one the customer workflow expects.
• Resume a saved or suspended order.
• Void a saved or suspended order.
• Waste order, for product made and not sold.
• Refund order and refund a specific amount.
• Reprint the last order receipt.
• Resend the order to the kitchen.

Splitting

• Split order.
• Move items to new orders.
• Move a quantity of items rather than the whole line.
• Share items, and split order segments while in share items mode.

Order segments

Segments are the enterprise structure for one order paid several ways.

• Add a segmented order, or add a segment to an existing order.
• Split order segments from an order.
• Share an order item across segments, evenly or unevenly, and remove a share.
• Move items out of a segment, or delete a segment.
• Segments carry their own states, which govern what can be done to them.

Reference

Order-Level Procedures and Order Segments.

Source: Global Payments / Xenial Enterprise POS product documentation. Enterprise sites are heavily configured, so confirm the exact behaviour against the customer own build before advising a change.