Table of Contents
The purpose of Physical Chains is to isolate a subset of components via interface connections between them or with enabling systems in order to visualize / focus on / study / work on them separately.
The projection "4.c. Physical chains - all" shows all the Physical Chains of a project.
This parent projection shows all objects (hidden ot not), therefore, it is not meant for "real work".
However, It has one important feature: it allows you to delete first level objects from the physical chains (the sub-projection "4.1.C. Physical chains" does not allow object deleting, only hiding)