How to create a Torus

To create a Torus

• click on the torus button

• In any viewport, drag to define a torus

• As you drag, a torus emerges with its center at the pivot point.
  

• Release to set the radius of the torus ring

• Move to define the radius of the cross-sectional circle, then click to create the torus

• check the slide on checkbox
  

• and type '180' on it

• then the torus will be like this: