The Action of a Guitar

Ah, got ya. I'm always thinking in terms of electric guitars. Thank you Sir Nick.

8)

I always forget people play electric.

just resurfacing the battle axe here:

nick, i agree that the adjusting the truss rod does not adjust the action,
but it AFFECTS it ;)

that's what I wrote.

You don't use the truss rod to adjust action. You use it to adjust relief.

You use nut height, saddle height, bridge height to adjust action.