Blender Tips : Local Collection view & Collection Instances
little tips for those who are interested in Blender:
you can assign local views collection in each viewport window. Also you can use each Collection as Collection instances. so you could for example work on a part of your mesh in the center of viewport keeping the axes aligned to work more easily, while seeing live what it looks like with the whole collection in place. you can even scale it negatively to see the mirror of your instance collection live. Blender is great