To open the DoBeSphere tool, double-click on "DoBeSphere"
in the Toolbox.
To understand how DoBeSphere operates, imagine a "virtual
sphere" that is centered at the location you designate with the tools Origin Tab, sized to just surround all of the currently selected
points. When you alter the X, Y, Z Mapping Factor values, the currently selected points
will be moved "inward" or "outward" along each of the axes towards the
surface of the virtual sphere. For example, consider the following object, and assume that
"Geometric Center" is set on DoBeSpheres Origin
Tab:

With X, Y and Z Mapping Factor all set to "0.5", the
object is moved halfway between its current shape and the shape of the virtual
sphere surrounding it:

With X, Y and Z Mapping Factor all set to "1.0", the
object has now assumed the shape of a complete sphere:

With DoBeSpheres Origin Tab set
to "Min Y", the object is still conformed to the surface of a sphere, but the
sphere itself is now centered around the objects minimum Y coordinate. The sphere
size is still calculated to just enclose the object, so the sphere has grown:

Note that you can also use DoBeSphere interactively, LMB Dragging to alter the Mapping Factors of the
two axes that arent Active; or, you can
hold down either control-key and LMB Drag to
alter the Mapping Factor of the current Active
Axis. Finally, you can hold down either shift-key and LMB Drag to alter all three Mapping Factors at
once.