Quick update - A number of members have reported issues rotating floorplans. The reason is that the control was hidden, you had to go to corner and wait for the control icon to appear.

We've improved this in 2 ways: now there is a visible rotation control and when the floorplan is being rotated or moved it is temporarily turned somewhat transparent to more easily see where you are positioning the floorplan on the map. It is demonstrated below:

Try it out on the Calculator here.