The page /VerticalAlphabeticalScrollDemo/ExampleWithOffset demos how to use OffsetTop, OffsetTopUnit, HideLetterBall_DelayInMinutes and ExtendedClass in more detail.

• OffsetTop can be pixel or viewport height units (vh)
• HideLetterBall_DelayInMiliseconds will adjust how long the letter ball is on screen before disappearing.