When more has control of your screen, you can hit the spacebar to display the next screenful of information, use the '/' to search for text, or type 'q' to quit. See the man pages on the more command for even more options on using more.

This command displays the /etc/passwd file one screenful at a time.

ps -ef | more

This command displays the output of the ps -ef command one screenful at a time.