Explanation/Reference:
Explanation:
How to: Rebuild an Index (SQL Server Management Studio)
To rebuild 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 that contains the table with the specified index, and then

expand Tables.
Expand the table in which the index belongs and then expand Indexes.

Right-click the index to rebuild and then click Rebuild.

To start the rebuild operation, click OK.

References: https://technet.microsoft.com/en-us/library/ms187874(v=sql.105).aspx