Actors (& Stage Managers) use a shorthand to show movement on stage. Any stage movement from one area of the stage to another is called a ‘cross’.
Action – walk downstage right and stand behind the sofa
It takes too much time to write that in your script so you write in abbreviations
Use ‘X’ for crossing
So, in your script where the director wants you to walk downstage right and stand behind the sofa write - XDR to US of sofa
(this is assuming you are CS) US of the sofa means you are somewhere behind it.
Some common shorthand to use:
X = cross b/h = behind i/f = in front of
to (use arrow) fr = from ent = enter
ex = exit w/ = with . . . . = pause
p/u = pick up p(with arrow for direction) = push L = look