You are asked to type in the filename you wish to encrypt, and then you are asked for a list of users to whom you would like to encrypt this file. You are asked to type in userids and then enter an empty name when you are done. Then PGP will ask for your passphrase. It will output the signed and encrypted file in ASCII armor to the file filename.asc.
After PGP is done, it will wait for you to tell it to return to the main menu.