does your control have the command menus at the bottom of the screen? You can use the EDIT menu to start a new program.
With the older software, go to ENTER NEXT COMMAND and type IN,1 and press ENTER. Next at the bottom of the screen type the "O" word and press enter. The cursor will move the next line at automatically enter N2. Now just start typing each line of your program. At the end of each line press enter. Repeat until the last line is entered. Exit the INSERT mode by pressing ENTER a second time on a blank line.