SAP Message REMPT054 - Select a period of time

Procedure
You want to move quantities on the time axis. To do this, you have tochoose a period to which you want to move the quantities or over whichyou want to distribute the quantities.
You have two options:
Select one or several columns (preferred method).
Access the period selection (function key).

System Response
The quantities are distributed over the columns or periods depending onyour specifications.