EDIT

Command: #edit {option} [argument]

         The edit command can be used to turn the default line editor into a
         text editor.

         #edit create [filename] [arguments]
           Create an editor, initialize using the provided arguments.

         #edit load <variable>
           Create an editor, initialize using the provided list variable.

         #edit read <filename>
           Create an editor, initialize using the provided file.

         #edit resume
           Resume editing after a suspension.

         #edit save <variable>
           Save the editor to the provided variable.

         #edit suspend
           Suspend editing, similar to pressing enter except that no
           events are triggered.

         #edit write [filename]
           Write the editor content to file.

Example: #edit create {bla.txt} {line 1} {line 2}

Related: cursor and macro.