If you make modifications to a table you can revert the table to its original state.
To revert table customizations:
In Enterprise Designer, select Tools > Table Management.
Select the table you want to revert.
Click Revert.
The Revert window displays. It lists all of the added,
removed, and modified terms.
Select the Revert check box for each table entry you
want to revert. You can also click Select All or
Deselect All to select or clear all of the
Revert check boxes.