This allows you to rotate the object to inspect it, but it should snap back to its original orientation once you’ve finished. If you choose to paint it another color, you may see the Sphere icon appear afterwards. The fourth (at the 9 o’clock position) will pull or push the cone closer to or away from you. Three of the handles will rotate the cone in space. When you release the button, a box will surround the object, with four circle-shaped handles. It’s a little confusing, but you’ll get the hang of it. Paint 3D assumes you’ll want to paint the Canvas first, then create 3D objects. Microsoft’s Paint 3D interface: Tools, 3D Objects, Stickers, Text, Canvas, and Effects.
