"No matter a plane mirror is placed closer to or farher away from you, the portion of your body seen through the mirror is always the same"

Steps:
(1) Drag the mirror to set its plane parallel to the screen.
(2) Drag the scrollbar "object distance" to its far right end.
(3) Check the box "Smaller Mirror".
(4) Then use the scrollbar "Shift the mirror (Front-Back)" to change the object-mirror distance.