Editing Zoom (section)

===NOTES===
 state = 0 (default) use all coordinate states
 state = -1 use only coordinates for the current state
 state > 0  use coordinates for a specific state

 complete = 0 or 1:

Normally the zoom command tries to guess an optimal zoom level for visualization, balancing closeness against occasional clipping of atoms out of the field of view.  You can change this behavior by setting the complete option to 1, which will guarantee that the atom positions for the entire selection will fit in the field of an orthoscopic view.  To absolutely prevent clipping, you may also need to add a buffer (typically 2 A) to account for the perspective transformation and for graphical representations which extend beyond the atom coordinates.