to pan the view, use the WASD or arrow keys on your keyboard.
to stop or start the rotation, click on the lever in the 3D window.
to spin the object when not automatically rotating, click-drag with the mouse.
to select a different object in the drop-down menu (the hamburger icon at the top left in the 3D window).
to switch to full screeen mode, click the goggles icon at the lower right. When you are browsing this page using a VR headset like Google Cardboard/Daydream, SamsungGear VR, HTC Vive, Oculus Rift, etc., this icon takes you to the virtual reality view. This is still work in progress, but already worth a try!