TEST is the second tab you come to after you have got your hardware configured in SETUP.
TEST allows you to test any channel
a) Non rgb
2) dumb rgb
3) smart rgb
that you have in your show. You can go to a specific channel and turn on a rgb led, you can do chases, you can cycle colors.
I use it for verifying that all my hardware is configured correctly.
Did you know?
You can only click a range of channels, like your arches, and then save it with a name "arches". Next time you come into TEST you can load these predefined channel ranges. This allows you to send patterns to each display element and test them.