Dear ChimeraX community, I need to colour the surface by selected side chains to highlight an intermolecular contact. The command sequence: #select atoms on the buried surface. The selection works correctly: measure buriedarea #10/C:449-end withAtoms2 #9/A:449-end select true #make a surface. A new surface #10.1 is generated: surface #10/C resolution 7 #color surface yellow at selected residues. color #10 & sel yellow target s The last command does not result in surface colouring although reports "colored 1 surfaces" upon its execution. Where is a mistake in the colouring approach? I run chimeraX version 1.0 (2020-06-04) on Ubuntu 18.04. Thank you and best regards. Oleksiy Dr Oleksiy Kovtun Research Fellow Briggs group MRC Laboratory of Molecular Biology Francis Crick Avenue Cambridge CB2 0QH UK Tel: + 44 1223 267551 Email: okovtun@mrc-lmb.cam.ac.uk