Goodmorning.

This is the same in ALL modeling applications.

You import a figure in a 3D space.

Every point (vertex) has a X,Y,and Z value.

When you moprh?
You take one vertex, one edge or one poly (or more of them if you select more of them at once) and you slide them to a new position.

If you select the whole figure by mistake?
You put the whole figure in a new position in 3D space.

This can lead to some very strange results afterwards.
Symmetry will give the strangest results too... as the middle of your figure is not centered in 3D any more...

Poser 1, 2, 3, 4, 5, 7, P8 and PPro2010, P9 and PP2012, P10 and PP2014 Game Dev
"Do not drive faster then your angel can fly"!