It does make me think how overly dependent we are on technology when the simple old ways would do just as well.

Draw the room floor plan and rectangles to scale to represent the furniture.

Print out the floor plan and print out the furniture rectangles.

Cut out the rectangles ( they will be labelled, of course) and place over the floor plan. Photograph and send a picture to the other room planner, together with a PDF of the blank floorplan and rectangles.

Play design ping-pong using pictures of your paper designs.