Private Sub Worksheet_SelectionChange(ByVal Target As Range)
If Not Application.Intersect(Target, Range("F8:F19")) Is Nothing Then 'modifie ton tableau
application.enableevents=false
Range("F8:F19").clearcontents
target.Value = iif(Tarrget.Value = "X";"";"X")
End If
application.enableevents=true
End Sub