How to: Open an existing table in Design view.
Solution:
Select the table in the Database window, and click 'Design'.
1) If the Database window is not active, activate the Database window.
2) Click the 'Tables' tab in the Database window.
Tables tab
3) Select the table to open from the list. (The table name is highlighted.)
4) Click 'Design'. (The table opens in Design view.)
NOTE: To save any changes in the Table Design view, select the 'File' menu and select 'Save'. Changes to a table's design are NOT automatically saved without selecting 'Save' from the 'File' menu.
