How can I change identity property in SQL Server 2008?

sql-server, sql-server-2008

Solution

under tools-->options-->designers-->table and database designers

uncheck prevent saving changes that require table re-creation

Problem

I have a table which has no identity column. I want to change a column's identity specification, but SQL Server 2008 doesn't allow that. So, how can I change identity property in SQL Server 2008?

Original source