[ccp4bb] rebuild by coot

[Dialing Pretty]

Dear All,
If I rebuild a 4-residue peptide, and the first 1 is leu. When I rebuild the 
first one, the sidechain of leu occupies the electron density of the first 3 
residues. Can you tell me the method to turn the side chain of Leu from 
position of the first 3 residues to its sidechain position in the electron 
density may?
In addition, for coot real space refinement, can you tell me how many residues 
or the length of the fragment one time can process?
Dialing