Private Sub Workbook_SheetActivate(ByVal Sh As Object)
With Application
If .WindowState <> xlMaximized Then .WindowState = xlMaximized
End With
Select Case Sh.Name
Case "LUNDI", "MARDI", "MERCREDI", "JEUDI", "VENDREDI", "SAMEDI", "DIMANCHE"
[A1:AR30].Select
Case "INTERIM" 'select ce que tu veux ici
[A1:H25].Select
Case "chauffeur samedi" 'select ce que tu veux ici
[A1:H37].Select
'etc....
End Select
ActiveWindow.Zoom = True
Application.Goto [A1]
End Sub