When you are changing different angles you will often 'cheat' the items in a given location, among other things. This means that from the master shot you are not going to maintain the spatial relationships that were established. In the story space all the objects are in a fixed location, as they are in real life until they are moved. This is established, but to get other angles you may have to move objects around to get the proper image. It is no to appear as though those objects have moved, but they are so as to accommodate your needs. It is in this way that you cheat the scene. For example, you may have a master shot with two people sitting on a couch. That couch may be pushed into a corner, with the back and side against the wall. If you want to get a shot from the side that is against the way you will have to move the couch over so as to get the camera in there. This form of cheating involves accommodation for camera position, but there are other types as well. This can take place so as to space things out for better motion of the characters, a better framing for the shot, or any other individual need. This will happen in between shots in your coverage.