At this dialog, you can change:
the segment on which a unique contraint is placed.
the number of rows per page.
the reserve page cap.
the fillfactor.
You can change the name of a unique constraint and you can change the segment is placed on. To change the segment of a unique constraint.
The columns tab lists columns of unique constraint, their type, and their order.
Viewing the properties of a unique constraint
Select the unique constraint.
Select File | Properties. The Unique Constraint property sheet opens.
Double-click the unique constraint icon.
Select the unique constraint icon, and select the Properties toolbar button.
Right-click the unique constraint icon. Select Properties.