LIST is used to list the game code stored in memory.
If LIST is used by itself, it will list the entire code of the game stored in memory (assuming it was written in Commodore BASIC)
To look a specific line, type the line number after LIST.
To list a section of code include the beginning and ending lines of the section separated by a dash. This will list lines 30 through 80:
To list all lines up to a line number, include the ending line and the dash, but not the starting line.
LIST - 80
To list all the lines from a line number to the end of the code, do the reverse:
LIST 30 -