Hi Andrea, The way that the "clashes" tool and command do it are to draw straight lines between the pairs of atoms that clash. <https://rbvi.ucsf.edu/chimerax/docs/user/tools/clashes.html> <https://rbvi.ucsf.edu/chimerax/docs/user/commands/clashes.html> There is no way I can think of in ChimeraX to draw arbitrary squiggly lines. The only related approaches that I can think of are to - use a 2D Labels symbol like a circle (you can use any size/color and drag it to wherever you want) <https://rbvi.ucsf.edu/chimerax/docs/user/commands/2dlabels.html> - use a 2D Labels arrow (you can use any size/color and control where the endpoints are) - select some item (you can change the selectionoutline color from the default green to some other color) but then the outline will go all the way around that item <https://rbvi.ucsf.edu/chimerax/docs/user/commands/graphics.html#selection> However, there is no option to just draw a line freehand on top of the image. However, most image-editing programs have a simple drawing tool to do it. I hope this helps, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Department of Pharmaceutical Chemistry University of California, San Francisco
On May 21, 2022, at 1:38 PM, Andrea Dallapè via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:
Dear ChimeraX Team,
I would like to ask you if there's a simple and easy method (without using external software) to label the steric clashes, as in the attached image (the red line between the ball densities).
Thank you for your help and attention!
Andrea
<image.png>