What are the different arming modes available on the VISTA-20P and what does each one do?

The VISTA-20P offers five arming modes: STAY (perimeter only, entry delay on), NIGHT-STAY (perimeter plus selected interior zones, entry delay on), INSTANT (perimeter only, entry delay off), AWAY (entire system, entry delay on), and MAXIMUM (entire system, entry delay off). STAY mode allows movement within the premises while doors and windows are armed, while AWAY mode is used when nobody will be inside including pets. MAXIMUM mode is recommended for extended absences such as vacations since entry through any door will immediately trigger an alarm. (Page 17)