Automation

[Jon Solitro]

How do I change the volume automation of a track until the end of the 
session? I have a song where I want to bring the volume of the bass guitar 
down , and whether I'm in touch, latch, or write mode, as soon as I hit 
stop, it goes back to the original volume. Do I have to play all the way to 
end of the song for it to stay that volume or is there a quicker way to 
apply a volume to the rest of the song?