At the top of the order grid there are five buttons that appear with the default names of 'Entrée' 'Mains' 'Desert' and 'Course 4' and 'Course 5'
These are for your course groupings. These can be used to organise the dishes that you are ordering.
The column to identify this is marked 'C' in the order grid.
By default this will be marked as course 2.
If you are not using course settings as a general rule, then you can disregard this as it will have little bearing on your service.
However, to change the course setting of an item in the order grid, simply highlight the item in the grid and hit the course grouping you desire.
This will change to number under the 'C' column and force a change on the printed docket for the kitchen.
(This won't change the order of the order grid items but will be printed with a page break between each course)