MICROS HELP – How to add a condiment in Micros POS system?

MICROS HELP – How to add a condiment in Micros POS system?
I need to add some additional buttons to the system. For example, if some one orders “Steak” with mushroom sauce and veges and mashed potatoes.
He also wants meat to be cooked very well.
How to get these buttons on your screen when you press the Steak button?
A specific step by step answer would be greatly appreciated.
Thanks in advance for your help.