Declaration: TMat4D.NrOfTimeSlots: integer;
The property NrOfTimeSlots controls the number of time slots of the hypercube matrix. The matrix elements are addressed starting with an index of 1.

Hint: If you have to adjust not only NrOfTimeSlots but any of the other dimensions (NrOfColumns, NrOfRows, or NrOfLayers) as well, then it is faster to use the method Resize.