newbie needs help veiwing files

[DOUGLAS HUNTER]

When I'm in bash and trying to ls large files I can only see the last part of the file due to it scrolling past too fast. Is there a command to insert that means I can veiw the output page by page and change pages when I want to ? I've also got a problem with GNOME in that the screen only partially fits onto my monitor any idea where I can find the config file for this? Thanks in advance                                                                                    Douglas Hunter