Dear chimera users,

I am using chimera 1.10.1.

open... pr.pdb

action... surface... show

to obtain *.dx file, I typed APBS in command line, after minutes, *.dx file was created and surface color window was opened, I pressed color tab.

Please see the figure in following link:

Why are the colors black and white in the surface, instead of blue and red?

Any help will highly appreciated.