The maps below compare two floor plans of one trade conference held in 2009 and 2010

The provided maps show the changes in the design of two floor-building plans for a trade conference in the years 2009 and 2010.
Overall, the biggest change shown is that the two separate areas opposite to the main entrance were changed into one larger area. Moreover, one more registration area was built next to the balcony in the latter plan.
It is obvious that the entrance areas, including the main and side entrance, and the registration area in halfway of those remained unchanged. Meanwhile, the large area which was in the southwest corner of the design experienced a big change. The concert hall with seats and the stage next to it was moved to the position beside the balcony, while the exhibition was relocated to give way to the concert hall. That area for exhibiting was moved to the original position of the concert hall and the meeting room with the stage inside.
Moreover, the display area in the design in 2009 was then removed completely, and there was one more registration room constructed on the left-hand side of the balcony. The balcony area was added and developed into a balcony with a lounge area.