label_position (vector, default: [0.0, 0.0, 1.75]) controls the position and alignment of labels in camera X, Y, and Z. Values between -1.0 and 1.0 affect alignment only, with the label attached to the atom position. Values beyond that range represent coordinate displacements. For the z dimension, values from -1 to 1 do not mean anything. Values above 1 and below -1 are offsets (minus 1 of the absolute value) in world coordinates. For example, the default 1.75 is .75 angstroms closer to the viewer.