Pitching Rules: Does a Pitcher Need to 'Present' the Ball?

Question
For high school, does the pitcher have to present the ball before the pitch?  If yes, can you define "present" please.

Answer
The word present does not appear in the high school rule book in regards to pitching.  This question pops up here once a year or so.

The pitcher steps on the pitching plate with hands separated.  The ball can be in either hand.  The pitcher must then pause long enough to take a signal or simulate taking a signal before bringing the hands together to start the pitch.

Tom