Accessing Subtrim Menu

Hello,

My 130x always spins to the left on spool up. I unplugged the motor to observe it, the tail goes all the way to one direction, and my swash tilts in the same manner. I heard it was a subtrim issue. How do I access the subtrim menu? I am using a devo 8.

Go to the mixer page, and select the servo you want to add subtrim on. The page that comes up has subtrim in it.

Here's a youtube video link that shows you how to apply subtrim on the 130X.

When I got to rudder and go from .5 to 10 nothing happens

Actually I was on the trims page which is why nothing happened. I'm still a noob lol. Thanks for your help