How to: Modify an Index (SQL Server Management Studio)
This topic describes how to modify an index by using Object Explorer in SQL Server Management Studio.
Indexes created as the result of a PRIMARY KEY or UNIQUE constraint cannot be modified by using this method. Instead, the constraint must be modified.
To modify an index
In Object Explorer, connect to an instance of the SQL Server Database Engine and then expand that instance.
Expand Databases, expand the database in which the table belongs, and then expand Tables.
Expand the table in which the index belongs and then expand Indexes.
Right-click the index that you want to modify and then click Properties.
To modify index columns
To add, remove, or change the position of an index column, select the General page from the Index Properties dialog box.