Using a straight edge… thanks to Tom Osuch….I check to see which way to go..
Be certain to position the straight edge down the center of the fingerboard, the radius can throw ya wayyyyyy off.
And continue adjusting the truss rod until it is as level as possible. You almost certainly will not be able to get it “dead” level, that’s why we do the fret leveling..
If the last handful of frets fall away, this is not a problem. The trend today is to have the last several frets lower than the others to facilitate modern playing styles…
I’ll address that later….
Ron Kirn