Add them to a new group then close the group so you only see the group
header. (After adding the group, drag the calendars to it.)

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Diane Poremsky [MVP - Outlook]
Author, Teach Yourself Outlook 2003 in 24 Hours
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> I found that in Outlook 2007, any calendar that I have in my Folder List
> will automatically showed up in the My Calendar group. How do I remove
> some of the calendar from the My Calendar group?