Hi Vincent,

I don't think there's any control for that, but it's pretty simple to hack into the code of your ChimeraX installation.  You need to edit a file named structure.py in your installation.  To find out where that file is, open ChimeraX's Python shell (Tools→General→Shell) and type:

from chimerax.atomic import structure

structure.__file__

The output from that second line will show where structure.py is on your system.  Use an editor to change line 2223 of that file from:

return str(self.atom)

to:

return str(self.atom) + " bfactor %g" % self.atom.bfactor

Make sure to retain the indentation (which is important to Python) and that you write out the file as plain text.  Then the next time you start ChimeraX the balloons should show the atom's bfactor information.

--Eric

Eric Pettersen

UCSF Computer Graphics Lab

On Sep 5, 2025, at 2:31 AM, Vincent CHAPTAL via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hello, 

I'd like to know, in addition to residue name and model, the bfactor of a residue when the mouse goes over it. 
For example model#1.20/A PHE 1482 bfactor 120.7

Could you help me to do it? 

Thanks a lot.
Vincent

-- 

Vincent Chaptal, PhD

Director of GdR APPICOM

Drug Resistance and Membrane Proteins Lab

MMSB -UMR5086

7 passage du Vercors 

69007 LYON

FRANCE

+33 4 37 65 29 01

http://www.appicom.cnrs.fr

http://mmsb.cnrs.fr/en/

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