Exceljet

Quick, clean, and to the point

Move one screen down

Windows shortcut 
PgDn
Mac shortcut 
Fn

Moves current selection one screen below the active selection. The distance covered depends on the size of the window. If there are 25 rows visible (of the same height), the active selection will move 25 rows down.

This is the best Excel training site I have ever seen. -Kedy
Excel foundational video course
Excel Pivot Table video training course
Excel formulas and functions video training course
Excel Shortcuts Video Course
Excel Charts video training course