Inflate Uniform
The Inflate Uniform tool moves the selected vertices, edges or polygons as if you were inflating a spherical balloon.

Performing a inflate uniform.
Properties
| Pivot | The coordinates to inflate around. |
| Radius | The radius of the sphere you are approximating with the inflation. |
| Ratio | The ratio of the inflation. 0 means no change, 1 means perfect inflation to a sphere. |