For a description of the 3d Placement utility, see 3d Placement.
To use the 3D placement manipulator
The texture’s place3dTexture node (swatch) appears in Hypershade and a manipulator appears in the view panel.
To use the Fit to group bbox option
The texture’s place3dTexture node (swatch) appears in Hypershade and a manipulator appears in the view panel.
Select the Fit to group bbox to reposition the 3d texture. This causes the 3D texture to be scaled, moved, rotated as necessary to the assigned object’s bounding box.