-- the add icon can be used to insert a new record of this type.

-- the edit icon can be used to modify a record.  Note that in most instances, double clicking on a row will provide the same behavior as clicking the edit icon.

-- the delete icon can be used to remove a particular record.  Note that due to referential integrity constraints, you can often not delete a record if it is being referenced elsewhere in the system.  If you do delete an entry that has yet to be used, deleting it will also delete any related Accounts that have been established.

-- the account missing icon indicates that the current entry does not have any associated accounts defined. Clicking on this icon will display a screen where you can manage the accounts associated with this entry.

-- the account present icon indicates that the current entry does have associated accounts defined.  Clicking on this icon will display a screen where you can manage the accounts associated with this entry.