The Edit menu is used to make changes to the database’s network, select or unselect all network items, find a network item using it’s index number, and toggle on and off the highlighting of selected items.
Some of the options on this menu operate on the “selected” items. Items are selected by pointing to an item with the mouse cursor and using the LeftClick keystroke. An item will change color to indicate that it is selected. Repeat this same sequence to unselect an item. Several items can be selected at the same time by drawing a marquee box around them. This is done using the Shift-LeftClick-Drag keystroke sequence. Several items can be unselected at once by again drawing a marquee box around them, with the Ctrl-LeftClick-Drag keystroke sequence.