Gibbs, M.L. Colocho, W.S. Osman, A. Shtalenkova, J. Slepicka, H.H. JACoW Publishing Geneva, Switzerland 2226-0358 978-3-95450-209-7 10.18429/JACoW-ICALEPCS2019-WESH4002 English 1525-1526 WESH4002 interface controls linac klystron electron Contribution to a conference proceedings 2020 2020-08 https://doi.org/10.18429/JACoW-ICALEPCS2019-WESH4002 https://jacow.org/icalepcs2019/papers/wesh4002.pdf PyDM (Python Display Manager) is a framework for building control system user interfaces. A user interface for the LCLS (Linac Coherent Light Source) simulator has been built in PyDM. The simulator interface gives a realistic experience of operating many parts of the LCLS accelerator, and can be used for training new accelerator operators on routine tasks. This interface also provides a good demonstration of the experience of using PyDM in a real-world environment.