How can i change velocity.x or velocity.y on orchestrator

it helped me.

If i were to write this as code.

Extends CharacterBody2D

func _physics_process(delta):
  # Vector2( 0 , 1 ): is gravity direction
  # delta * 980: pixel gravity constant multiplied by the change in time.  
  self.velocity = self.velocity + ( Vector2( 0 , 1 ) * ( delta * 980 ) )
  self.move_and_slide()

I noticed i could have connected the delta from physics process event. But I hope you can see the picture.

Also if you want to work with a single axis in isolation, you can break a vector like this example from the link.
image
You just have to recompose it back into a vector (make vector from float ) before you set velocity.