Go to the start of work hours in the selected day (Home )
Go to the end of work hours for the selected day (End )
Go up one page view in the selected day (Page Up )
Go down one page view in the selected day (Page Down )
Change the duration of the seleted block of time (Shift + Left Arrow, Shift + Right Arrow, Shift + Up Arrow or Shift + Down Arrow, or Shift + Home or Shift + End )