In eXpress, a symbol is a graphic element that has not yet been added to a design. Once added to the design, the symbol becomes anObjector Annotation(the term symbol, however, is still used to refer to the specific picture associated with that object). Although eXpress provides a symbol library that contains common electronics, hydraulics, and flowcharting pictures; the Analyst can extend the supplied library by Importingadditional symbols that have been created using an external tool.