You can modify a table field by first clicking on its name. You will see the same form window that you used to create fields.
Please note: the field name and type can no longer be changed.
Text fields of type VARCHAR can have an associated field size. Field sizes of the other database field types are fixed and inalterable. However you can modify the field's description, initial value, and the number of decimal places. You can also modify the field's setting for automatic process start at any time.