While creating an entity object with the Entity Object Wizard or editing an entity object with the Entity Object Editor, you can do the following in the Attributes page:
Define a new entity attribute — For reverse generation, you can define a new transient attribute. For forward generation, you can define both transient and persistent attributes.
Add an entity attribute from a table — For reverse generation, you can a new attribute from a column in an existing table. When you first create an entity object, this Entity Attributes list is populated with attributes from all columns in the table you selected in the Name page.
Remove an entity attribute — Remove attributes that you don't want to be part of this entity object.
Order entity attributes for forward generation — The order that the attributes appear in the Entity Attributes list is the order that the columns are created in the table.