Open the Script Editor to edit program or other text files
ED <filename> | (<expC>)
ED opens the Script Editor to create or modify program files and other text files. The filename can be substituted with a <expC>, enclosed in round brackets, which returns a valid filename. If no file extension is present in the file name, then '.prg' is used.
ED is a synonym of the MC, MODIFY COMMAND, MODIFY FILE and VI commands.
modify command myprogram ed myprogram mc myprogram modify file myprogram vi myprogram