This user has the following column permissions   Lists columns and type of permissions the selected user has on each column in the table. You can click the fields beside each column to grant or revoke permissions; double-clicking (so that a checkmark and two + signs appear) gives the user grant options for the permission.

Details   Displays the Column Details window for the selected column. The Column Details window shows the name, type, primary key, unique constraints, whether NULLs are allowed, and comment for the selected column.