Sub Macro1()
Application.ScreenUpdating = False
'records current sheet
Set c = ActiveSheet
'sets all zooms to 75%
Sheets.Select
Sheets(1).Activate
ActiveWindow.Zoom = 75
'set smaller list of selected sheets to alternate zoom (change to suit)
a = Array("Sheet1", "Sheet2", "Sheet3")
Sheets(a).Select
Sheets(a(0)).Activate
ActiveWindow.Zoom = 200
'returns view to starting sheet
c.Activate
End Sub