Zoom is really unfriendly in these nested flow scenarios from what I can see. Having the nested flow fit to its content or slightly larger gives it a more nested/wrapped feeling in my opinion. If I do ...

This demonstration shows nested instances of JsPlumb being rendered into the nodes of some top level instance. The code implements a simple desktop app. Windows can be dragged around, minimised, ...

This flowchart shows feature selection and model training. Rectangles in blue represent data and rectangles in gray represent the processes. The all-relevant features selection step was nested in ...