For that, it is indifferent if you use pro or free. When you are in a parallel projection > top (standard) view, make sure to create a scene (View menu > Animation > Add scene) and once you inadvertently navigate out of this top view, just click on the scene tab and it will get you back. You can also use 3D components (furniture and such) to populate your 2D floor plans but if you only want to use 2D components, make sure they are set to glue to a horizontal plane and also that they cut a hole in their gluing plane otherwise you will experience some nasty Z-fighting between the floor face and the component face being on the same plane/space.