There are these 2 features that easily seen as soon as we clicked at our character
3D Settings
3D Character Settings
And, don't forget that we can configure how big our character looks like manually, by dragging that box surrounding them.
Outer Box (Red Box) :: Configure how large the area we want to show our character in, we also able to rotate the area
Inner Box (Blue Box) :: Configure the position of the character inside the area (Outer box), we also able to rotate the character