To edit the specific privileges of a user/role to a column of a table, follow the steps below:
(1) select the specific user/role in the leftmost panel
(2) select the specific a column of a table under the tree view
(3) check or uncheck the appropriate options in the rightmost panel
To grant (select) or revoke (unselect) privileges on all applicable operations, click Select All and Unselect All button respectively.
Click Save to apply any changes you have made.
Refer to Privilege States for more details.