Improving the structure from PDB



Dear All,
 I am dowmloading a secondary structure from PDB for publication purpose but
 I do not get a good quality image, can someone advice any software where it
 can be improved or worked on to look better?
 Also, my docking results from BiGGER needs to be improved, how can I do
 that?
 Please advice,
 Thanks,
 Jaya