At any time you may leave the text area and go to the command area by typing the large + key on the right hand side of the keyboard. Note that the right and left cursor keys, the Del key, and the Ins key will operate on the command line. Other cursor keys refer only to the text area. Write your file away by typing:
w filename
where filename is any valid pathname, followed by a carriage return.
After your file has been saved, the editor positions you back in the text area where you left off. You can now continue with the rest of the exercises or may leave the editor by typing the large + key again followed by a q. If you modify the file, the q command will not let you quit without saving your changes. If you do not wish to save your changes type qq to force the editor to exit.