Thank you
 that help me very much

I use also 
torsion #1.1/C:853@CD1,CG,CB,CA 140



--
Martin Piskacek
Laboratory of Cancer Biology and Genetics​
www.piskacek.org
Department of Pathological Physiology
Faculty of Medicine
Masaryk University Brno
Kamenice 5
625 00 Brno
Czech Republic



Hi Martin,
The "Pivot" function sets the center of rotation for the whole view, for when you rotate everything with the mouse. It does not rotate the bond. If you want to rotate the bond, instead use the "Bond rotation" mouse mode, the icon much further right on the same toolbar as shown in your image.

The Right Mouse icons and what they mean are listed here:
<http://rbvi.ucsf.edu/chimerax/docs/user/tools/mousemodes.html>

Best,
Elaine
-----
Elaine C. Meng, Ph.D.
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco


> On Jul 14, 2020, at 5:16 AM, <piskacek@post.cz> <piskacek@post.cz> wrote:
>
> Dear Elaine,
> thank you very much for your assistance, but
> I do everything correctly, but it just did not work = see figure
> I would like to rotate tryptofan in my figure, so as first I need to set pivot on the C-atom (designated here as CB) and than rotate with right mouse the tryptofan
>
> <Mail Attachment.png>