You can easily isolate a single molecule in your structure and hide the rest of the structure:
To isolate a single molecule:
Choose the Arrow tool from the Tool Strip.
Click on any atom in your target molecule. The atom should be shown highlighted, indicating that it has been selected.
Right-click in the Graphics Pane to display a contextual menu, then choose: Isolate Selected Molecules (or choose: Transform > Selection > Isolate Molecule). All atoms, apart from those in your target molecule, are hidden.
See Also