To navigate the Virtual Tour:

On a phone - click on the area you wish to move to or click on the circles on the floor to move to that area, click on the screen and drag to look around.

On a computer - you can click & drag using the mouse as above or use the cursor keys to move about and look around.

To view the floor plans view use the icons at the bottom left of the screen on phone or computer.  The floor plans also allow measuring of any areas with 99% accuracy.