Hello All

I have a question about my initial structure that I want to use for my first calculation in Material studion and be very thakful if help me. I want to built a supercell (1*3*3) from a periodic crystal which is in symmetry (Fdd2) (which is the symmetry that I want to keep for my energy calculation), and then I want to rotate one molecule located in the midle of this supercell by 180, the probleme is when I use the icon supercell to construct the supercell the symmetry go to P1, i have used the icon rebuil crystal to change the symmetry to Fdd2 but in this crystal with this symmetry when I rotate the disered molecule others molecules which are related by symmetry to this molecule rotate also, I have also tried to rotate this molecule in the symmetry P1 and then use use the icon rebuil crystal to change the symmetry to Fdd2 but the structure change completely and a new atoms are added im my structure. can you please tell me how I can rotate only one molecule?