  In this summary of the application of Dyson-Schwinger equations to the theory
and phenomenology of hadrons, some deductions following from a nonperturbative,
symmetry-preserving truncation are highlighted, notable amongst which are
results for pseudoscalar mesons. We also describe inferences from the gap
equation relating to the radius of convergence of a chiral expansion,
applications to heavy-light and heavy-heavy mesons, and quantitative estimates
of the contribution of quark orbital angular momentum in pseudoscalar mesons;
and recapitulate upon studies of nucleon electromagnetic form factors.
