The neck is removed from the body, the Dovetail, or Mortise & Tenon joint is carefully
cleaned of old glue and re-cut and re profiled along with the heel of the neck to increase the
pitch of the neck as it joins the body to reposition the neck and thus restore the adjustability
of the string action at the bridge. In this picture, the neck is in clamps during the re-gluing
stage. Properly performed a neck reset will not normally need to be done more than once
during the time you own your guitar. I've been doing them for over twenty years, and rarely
have I seen the need to perform a neck reset a second time, although there have been
occasions where we had to unset a neck that had been "over-set" by an "over-zealous"
Luthier or inexperienced repair person.