How to: Change the Appointment Book time scale.
Solution:
Select the 'Tools' menu and select 'Options...'.
1) Select the 'Tools' menu and select 'Options...'. (The Options dialog box appears.)
2) Click the 'General' tab.
Change time scales
3) Click on the down arrow in the 'Appointment Book time scale' drop-down list box.
4) Select the time scale from the drop-down list box.
5) (Optional) Click on the down arrow in the 'Appointment drag-drop time scale' drop-down list box to select the drag-drop time scale.
6) Click 'OK'.