Open the Room you want to manage.
Click the arrow next to the manage instances button from the menu bar, and select Add Instance from the drop down menu.
In the New Instance dialog box enter the name of the instance, and select if the instance is a manufacturing instance. The room must be a manufacturing instance for this field to be enabled. Click the Save button. N.B. The instance ID will be automatically set, to change it you must edit the Room Instance.
The New Instance Added dialog will confirm that the instance has been added to this room. Click OK to continue.
The new instance will now appear in the plate details grid, and be available to add plates to.