Brother MFC-8440 B - Manual (Page 56)

3 - 3 ON-SCREEN PROGRAMMING
Then set an option by pressing Set when that option appears on the
LCD.
The LCD will then show the next menu level.
Press or to scroll to your next menu selection.
Press Set .
When you finish setting an option, the LCD shows Accepted.
Use to scroll backward if you passed your choices or want
to save keystrokes.
The current setting is always the option with “
”.