AT&T 6300 Programmer's Manual page 40

Getting Started
2-22
• To modify a program line which is not
displayed on the screen, use the EDIT
command (see the Reference Section) to
display the line, or the LIST command (see the
Reference Section) to
displ~y
a group of lines
inCluding the line you want to modify, move
the cursor to the appropriate position, modify
the line, and press CR.
Note: You can edit any line as long as it is
visible on the screen. Once an immediate line
has been sent to the system pressing CR, there
is no way to edit it; this is not the case with
program lines, as they may always be recalled
for editing to the screen.
Remarks
No modifications are made within the
program until CR is entered. It is sometimes
more practical to move around the screen
making corrections to several lines and then
return to the first line changed and strike CR
at the beginning of each line, thereby storing
the modified lines in the program.
I t is not necessary to move the cursor to the
end of the logical line before typing the
carriage return. The Screen Editor remembers
where each logical line ends and transfers the
whole line even if the carriage return is typed
at the beginning of the line.
The preceding modifications only change the
program in memory. In order to save these
modifications permanently, use the SAVE
command before entering a NEW command or
leaving GWBASIC (see the SAVE and NEW
commands in the Reference Section).