Trim Objects
Trims excess borders for those image objects which have added to workspace to make the area surrounding transparent.Before you do it, a object must be selected at least.
EximiousSoft Cool Image provides two ways to implement it:
(1) Click Object >>Trim Object(s) menu item.
(2) Click Object Manage Commands icon in the objects panel,choose Object >>Trim Object(s) menu item (see following screenshot).