Bonjour,
Une proposition pour le principe.
Cdlt.
Public Sub EmptyCells()
Dim lastRow As Long, Rng As Range
With ActiveSheet
lastRow = .Cells(.Rows.Count, 1).End(xlUp).Row
On Error Resume Next
Set Rng = .Cells(1).Resize(lastRow).SpecialCells(xlCellTypeBlanks)
On Error GoTo 0
If Not Rng Is Nothing Then
Rng.Formula = "=R[-1]C"
Rng.Font.ColorIndex = 16
End If
End With
End Sub