The OSD can be configured to show certain parts of an order using the Display Category, using this will show categories the OSD is configured to display. 

This allows for orders to be split by workstation, for example: Bar and Kitchen or Starters, Mains and desserts. These categories are configured against the Items within the Product Configurator. 

Refresh Display - Use this to fetch the data again from the system, this is helpful for when you have had internet connectivity or outage issues.