General Form:

edit [ file-name ]

Print the current ngspice input file into a file, call up the editor on that file and allow the user to modify it, and then read it back in, replacing the original file. If a file-name is given, then edit that file and load it, making the circuit the current one. The editor may be defined in **** .spiceinit or spinit by a command line like

set editor=emacs

Using MS Windows, to allow the edit command calling an editor, you will have to add the editor's path to the PATH variable of the command prompt windows (see here). edit then calls cmd.exe with e.g. notepad++ and file-name as parameter, if you have set

set editor=notepad++.exe

in .spiceinit or spinit.