From the Tools menu, click Edit Definition Master. The Definition Master opens to the Securities screen.
In the left hand column, click Sector. The Sector screen opens.
Click . A new row in the editable grid appears.
In the Sector Code column, type the three character sector code. The code must be unique within an entity (like an office) that shares the security definition.
In the Sector Name column, type in the name for the sector. Limit 60 characters. The name must be unique within an entity (like an office) that shares the security definition.
Click . Your sector is defined.