To start GWBASIC, the MS-DOS operating system must be installed. At the system prompt, type GWBASIC.

GWBASIC SCREEN EDITOR

When you have the Ok prompt, you know you are in the "screen line editor." This allows you to write and make changes anywhere on the screen. Before you start writing a program, however, you must learn how to move within the screen and modify the program.

MOVING WITHIN THE SCREEN

AND MODIFYING A PROGRAM

The following keys will show you how to move the cursor on the screen.

<Arrow Keys>	move the cursor one position in each corresponding direction. Note that if the cursor is moved beyond the right or left edge of the screen, it will appear at the opposite side of the screen.
<Home>	moves the cursor to the top left-hand corner of the screen.
<End>	moves the cursor to the end of the current line.
<Ctrl><Right Arrow>	moves the cursor to the beginning of the next word.
<Ctrl><Left Arrow>	moves the cursor to the beginning of the previous word.
<Delete>	deletes the character the cursor is on.
<Back Space>	deletes the character to the left of the cursor.
<Insert>	switches you in and out of insert mode. If insert mode is on, the cursor is a blinking half-height block. In the overwrite mode, the characters typed will replace existing characters on the line. In insert mode, existing characters will move to the right as new characters are typed. Insert mode is turned off when you press the <Insert> key again.
<Ctrl><End>	erases from the current cursor position to the end of the current line.