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feynman is a web based application for drawing Feynman diagrams. It provides a graphical interface for constructing diagrams using drag-and-drop functionality from a toolbar as well as keyboard shortcuts for rapid design.  When the user first opens their browser to the application, they are presented with a pattern selection window. Patterns are discussed in more detail in section \ref{sect:patterns}. window to start the canvas off with one of the predefined patterns.  \subsection{Layout}