Outlook 2010 primary calendar

[Diana B]

I have 2 calendars...Office and Personal showing in Outlook 2010 a
follows:

Other calendars
Office calendar

My Calendars
calendar

The Office should be the primary but is listed as sub- of primar
"Other"; then my Personal is sub to My Calendars. I cannot ge
reminders for appointments saved to the Office calendar I believe
because it is not primary. How can I make Office primary