“center” translates the window, the clipping slab, and the origin to a point centered within the atom selection.
center [ selection [, state [, origin [, animate ]]]]
selection = string: selection-expression or name pattern (default: “all”).
state = 0 (default) use all coordinate states
state = -1 use only coordinates for the current state
state > 0 use coordinates for a specific state
origin = 1 (default) move the origin
origin = 0 leave the origin unchanged
chain chain B center 145/
origin | orient | zoom | cmd.center | commands