Configure a number of courses. Arrange their sequence and kitchen printer will print according to it's sequence.
Configure printing by course under Settings -> Print Options -> Kitchen.
Scroll to the bottom and you will find Categorized Printing.

pos system course settings

Category Default Course

Each category's default course can be configured.

pos system course category assign

Upon ordering, item under the category will be assigned to the course automatically.

pos system course ordering

Changing Item's course

If your diner decide to change their course sequence, you could select the item, click on Edit Course and change them.

pos system change order course

If you need to hold some of the order to not fire to kitchen, click Functions -> Manage Order.