The MCL editor, Fred

Saving source code to a file

If you want to use this source code later, you must save it to a file.

Choose the Save command from the File menu or press Command-S.
MCL will bring up the standard put-file dialog.
Type the name "Hello Dialog.Lisp". To accept the name, either press Return or click the Save button.

Gettmg Started with MCL - 19 OCT 1996