Moving polygons is useful when it comes to room objects import by IFC files. Its also needed when setting up a project with the BIM viewer.
When opening the polygon editor its common that the room objects are rotated wrong in relation to the floor plan. To get it to line up correctly we are going to use the R button. Either you can press the R button on the toolbar or use the R hotkey on the keyboard. Press on the center of the room objects with the left mouse clock and move the to the center of the Floor plan click again. The room objects can now be rotated correctly. Press the ESC button to finish. When done remember to save by pressing the button on the top right.