I think that if you right-click while you are in the calendar, it brings up a
dialog box with the option "other settings". If you select that, it will open
another box where you can select the calendar fonts and in the upper right
corner there is a selection for "Time scale" that you can change. Hope that
helps!
Sorry, I am using Outlook 2003 and my printed copy reflects whatever I change
my display to. Of course that only works with the Day and work week views.
I hope that Microsoft didn't change that function in 2007!