Automatic numbering of wires can be set in program settings (
If the box
enable wire numbering is checked, every new wire is numbered. If the box
pad with leading zeros is checked, the wire numbers are padded up to a certain number of digits specified in the text box
number of digits.
Another option is to leave the automatic wire numbering disabled and number the wires again once the drawing is completed. The
renumber now button serves that purpose.