(to edit an existing data type)
or the new data type icon 
(to add a new data
type).
Access this form by selecting the Datatypes node (within a database) in the
navigation pane and clicking
the design icon (to edit an existing data type)
or the new data type icon (to add a new data
type).
Name
Create a user-defined data type name or review an existing user-defined data type
name. This name can be used across a database to represent a data type.
Owner
Specify the owner of the user-defined data type.
Data type
Specify the base data type the user-defined name represents.
Length
View or change the length of the user-defined data type.
Allow NULLs
Specify whether the fields of this data type can allow nulls.
Rule
Specify the rule associated with the user-defined data type.
Default
Specify the default for the user-defined data type.
Bound Columns
View where the user-defined data type is used.