How should i be setting levels in Acid?

Each track has a fader and then there's a stereo master. I seem to have a knack for clipping the Master regularly. i looked in the manual but could not find specific info on setting levels. I record my guitar into it too but don't have too much trouble with that. Is there a global command to set levels of added tracks at a given level?

I'll look up the SF website but if someone has an easy fix i'll be grateful.