Hi,

I'm sure Dave's solutions are the way to go.
Here's mine just for fun:-)

Private Sub Worksheet_Change(ByVal Target As Range)
Select Case Target.Column
Case 1, 2, 3 'Edit to suit your needs
Application.EnableEvents = False
Dim rngCell As Range
Dim iNumChars As Integer
On Error Resume Next
For Each rngCell In Target
Select Case rngCell.Column
'Add extra Cases and edit to suit your needs
Case 1
iNumChars = 20
Case 2
iNumChars = 3
Case 3
iNumChars = 10
End Select
If Len(rngCell.Value) < iNumChars Then
rngCell.Value = rngCell.Value & _
Space(iNumChars - Len(rngCell.Value))
Else: rngCell.Value = Left(rngCell.Value, iNumChars)
End If
Next rngCell
Application.EnableEvents = True
Case Else
End Select
End Sub


Ken Johnson