Annotated Visual History
This is a screenshot of a snapshot of a given FreeCAD file in a file version history. This Screenshot should be annotatated to allow others to appreciate the difference between that file and previous files. This facilitates merging and non-merging decisions from a large pool of collaborators.
See this example from D3D_v19.06#CAD:
An annotated visual history is relevant for large-scale collaborative product development projects where many developers are working on CAD at the same time. The ideal solution is where a large number of people work on CAD in realtime with realtime updating of the CAD in a web-connected platform. However, this takes a lot of resources, and no open source solution exists for this yet.