% Copyright (c) 2018 - 2022, Martin Scheidt (ISC license)
% Permission to use, copy, modify, and/or distribute this file for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

\coordinate (A) at (-0.5,0);
\coordinate (B) at ( 0.5,0);

% symbol
\secondarytrack (A) -- (B);

% anchor
\anchor at (A);
\anchor at (B);