I found the simple mutate on the right vertical and attempted to mutate to Cytosine and got the following response
setup-mutate 1) (0) " C1'"/1/chainid="C"/1401/DC, occ: 1 with B-factor: 53.31 element: " C" at (-1.533,-49.588,103.117) : 0.131962 (setup-mutate 0) Pending Picks Cleared INFO:: backup file name coot-backup/_home_paul_ccp4_pdbs_PIC_c3DNA_1d3u.cif-coot-0.pdb_Mon_Dec_12_11:10:11_2022_modification_2.pdb.gz INFO:: 6 matched atoms had: mean devi: 9.6702e-15 rms devi: 1.16229e-14 max devi: 1.42542e-14 min devi: 2.22045e-16 (update-go-to-atom-window-on-changed-mol 0) ######################################################################## To unsubscribe from the COOT list, click the following link: https://www.jiscmail.ac.uk/cgi-bin/WA-JISC.exe?SUBED1=COOT&A=1 This message was issued to members of www.jiscmail.ac.uk/COOT, a mailing list hosted by www.jiscmail.ac.uk, terms & conditions are available at https://www.jiscmail.ac.uk/policyandsecurity/