Do you mean like at a new barn and they want to see where you are at in your riding?
Well if so, then just ride the horse how you would ride. W/t/C, figures, halt, go, leg yields, any kind of lateral work you know. Sometimes they tell you what they want to see, other times they let you do it. Keep in mind if YOU know how to do certain things, the horse may not so be sure to keep that in mind.
Relax, be yourself, and enjoy it! Always start with a soft cue then increase it if need be.
"Strength is the ability to use a muscle without tension"