I mostly draw data flows. Draw a bunch of boxes representing different services and sometimes different components, and labeled arrows describing where events/d

I mostly draw data flows. Draw a bunch of boxes representing different services and sometimes different components, and labeled arrows describing where events/data flows. When that's not sufficient, usually a sequence diagram adds a whole ton of clarity For reviews with new people, a limited ERD is handy, mostly to show where the 1:n or n:n relationships are I somewhat frequently write truth tables to get a good breakdown of different usecases I use web sequence diagrams for my sequence diagrams, but mostly everything else I'm drawing by hand in paint 3d with the surface's nice pen drawing