  Advances in knowledge of the structure of the photon and tests of
perturbative QCD have been made using the increased luminosity with the ZEUS
detector at HERA. Events with a low photon virtuality and two high transverse
energy jets have been studied. Measurements of inclusive dijet and multijet
production are herein compared to Next-to-Leading-Order calculations. In order
to analyse the structure of the photon, dijet production of quasi-real and
virtual photons and dijet production containing $D^{*\pm}$ mesons were
measured.
