  Meson transition form factors describe the coupling of photons and hadrons.
They are an important input to the calculations of the light-by-light
scattering contribution of the anomalous magnetic moment of the muon. At the
BESIII experiment in Beijing, the transition form factors of pseudoscalar
mesons are studied in their Dalitz decays, in their radiative production in
$e^+e^-$ annihilation, and in their production in two-photon scattering. All
relevant kinematic regimes are covered. An overview of the recent results and
the status of the ongoing analyses is provided.
