Check the current string height at the 12th fret
Tune the guitar to pitch before making adjustments
Inspect the neck relief with a capo and fretting test
Adjust the truss rod in small increments if relief is too high
Lower the saddle height on an acoustic guitar if more reduction is needed
Remove the strings before sanding the saddle
Sand the bottom of the saddle evenly on a flat surface
Reinstall the saddle and retune the guitar
Check for fret buzz after each adjustment
Lower the nut slots if the action is high only at the first frets
Use proper nut files and make very small changes
Verify bridge and saddle fit before final assembly
Replace worn strings if they are affecting setup measurements
Check for high frets or neck issues if action remains too high
Stop if the guitar develops buzzing, rattling, or playability problems
Take the guitar to a qualified technician if you are unsure about truss rod or nut work