Home > SQL Developer Dialog Boxes ... > Manage Columns
Use this dialog box to reorder, hide, or show columns in the display when you are editing a table or data in a table. To move a column higher or lower in the display order, click the column and then click the appropriate icon on the left. To hide a column or to show a hidden column, click the column if necessary and click the appropriate icon between the Shown Columns and Hidden Columns lists.
When you are finished, click OK. (Your action affects only the current display; it does not change the table definition or any data in the table.)