Training mode lets new staff practise on a live terminal without touching real money or real data.
While the device is in training mode:
Trainees can open tickets, ring items, split, discount and take a practice payment, and none of it reaches the books.
Same three steps, switch off. Do this before service. A terminal left in training mode takes orders that never reach the kitchen and payments that never settle, and it will not be obvious to the server. Make checking it part of the open checklist on any device used for training.
Source: Global Payments Genius POS User Guide. Newly built article, pending review.