Truncated Home Line
When editing a file with short records (e.g., Set Lang Text, Set Len 20), the right margin of terminal display memory is set to match the record length. This means that when typing home line commands you wrap the status line at the same width as the records (very inconvenient if the record length is 3 bytes!). You can, however, cursor past the right margin to type a longer command. Therefore, Qedit expands the right margin when you use F7 to execute the home line command, making it possible to execute a long command even when the data length is short. Qedit cannot expand the right margin if you press Enter (and may cut short your command).