Dialog Box - called from: Boundary Dialog
No boundaries whatever are used if this option is chosen, nor are any translations applied. That is, the atoms in the molecule are just those, and all of those, generated by the point-group symmetry specified (or the input atoms only, if there is no symmetry).
This boundary option is primarily for the case in which you already have absolute coordinates of a single molecule. To draw a single molecule which is in a crystal, using fractional coordinates and other data for the crystal, use one of the Molecules in Crystal options in the Boundary dialog, or use the Default Unit Cell, Enter Forms or Translation Limits boundary option to generate a volume large enough to include the molecule or other group, then use the Find button in the Generated Atom Data dialog (which appears when you click on an atom) or the Locate Groups dialog in the File menu to isolate the molecule or group. Also, you can use the Enter Forms boundary option to use pseudo-crystal faces to isolate part of a molecule - see the last paragraph of that section.