Hi
this can only be done with VBA. Put the following code in your workbook
module (not in an standard module)
Private Sub Workbook_BeforePrint(Cancel As Boolean)
Dim wkSht As Worksheet
For Each wkSht In Me.Worksheets
if LCase(wkSht.Name) = "alldata" then
With wkSht.PageSetup
.CenterHeader = wkSht.range("A1").value
End With
end with
Next wkSht
End Sub