Entry door cover, papers on tray and position a drawer.
Next step, cover for the paper entry door. Details below.
Now use push/pull on the surface of drawer position and pull it outwards. The result
is in capture above.
Again select the square object from left and place on top of entry door. Next push
it little outwards. Add some more rectangles vertically to act as hanging flaps.
Use similar approach to add some papers sliding on the tray. Also add a rectangle
on face to insert a drawer for paper collection. This is shown in capture above on