To be more specific, it is not the way, but where to stand, in the elevator when you are not alone.
 
See this picture below.
 

 
This shows where to stand, depending on which position you are among the members in the elevator.
 
①→ highest  
②→2nd highest　 
③→2nd lowest　 
④→lowest  
 

The lowest person should stand in front of a console to use it for other members(push the floor button and keep the door open when other members are getting off).

Don’t let the highest person to do it, it is considered very rude,, !!

It sounds like a tiny rule, but behaving with these tiny rules will bring you so much advantage to live in Japan.