Sub Remplacer()
Dim nlig&, tf, j%, i&
With ActiveSheet.UsedRange
nlig = .Rows.Count
tf = .Resize(nlig + 1).FormulaLocal 'tableau, au moins 2 éléments
For j = 1 To UBound(tf, 2)
For i = 1 To nlig
tf(i, j) = Replace(tf(i, j), "..", "=")
Next i, j
.FormulaLocal = tf
End With
End Sub