To change the columns displayed in the message list
  1. On the View menu, click Columns.

  2. To add a column, click the check box next to the column name, or select the column name and click the Show button.

    To remove a column, clear the check box next to the column name, or select the column name and click the Hide button.

    To change the order in which columns appear, select a column name, and then click Move Up or Move Down.