The discussion centers on creating diagrams, particularly arrow theoretic diagrams used in category theory, using LaTeX and various tools. Participants highlight the use of LaTeX's picture environment for basic diagrams, while recommending more advanced options like PSTricks and TikZ for their extensive libraries and capabilities. For connecting boxes with arrows, Graphviz is suggested as a useful graph visualization tool that simplifies layout by requiring only logical relationships to be specified. The Xy-pic package is noted as a standard choice for typesetting category theory diagrams, with a well-written user guide that provides helpful examples. While Graphviz automates layout, it may be more complex than necessary for simpler diagrams unless dealing with numerous nodes or automated outputs.