Hold the ALT key and then scroll the trackwheel to your choice.
Originally Posted by mrod7280
Open your Calendar. Press the trackwheel and select options. The 1st options is to select the INITIAL VIEW. When your current INITIAL VIEW is highlighted click the trackwheel and select CHANGE OPTION. I think the default is DAY but you can change it DAY, WEEK, MONTH, AGENDA, or LAST.