Right-click, and choose Edit Column
from the context menu. If you are connected to an OpenEdge database,
Edit Column is also available on the
OpenEdge Columns tab of the DB Details view.
Enter changes in the Edit Columns dialog.
Note: Generally you cannot change the data type of a column, but you can change
an INTEGER data type to INT64. Once you change to INT64, you cannot change
back to INTEGER from DB Navigator.