Hi Yazan,
Sorry, ChimeraX doesn’t have a mesh linewidth option. For the explanation, see:

<http://www.rbvi.ucsf.edu/pipermail/chimerax-users/2018-September/000315.html>

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


> On Jul 12, 2019, at 7:33 AM, Yazan Abbas <yazan.abbas@gmail.com> wrote:
>
> Hi,
>
> In chimera the volume mesh lineThickness option could be changed. I can't seem to find the equivalent option in chimeraX. Is it possible to change the thickness of mesh lines?
>
> Thanks,
>
> Yazan
>
> PS apologies if you received this message twice, there was an error in my browser when first sent...