Just learning Kicad, and never intended to use hierarchical sheets.
But then I ran into the limitations on copying between schematics and found suggestions that hierarchical sheets provide some options in this regard.
So I looked into creating a hierarchy within an existing project and it seems that I can’t create a parent sheet for (an) existing schematic file(s). Is this correct?
And that has led me to the belief that to use hierarchical schematics you must always begin by creating the top-most schematic, and then use the “Create Hierarchical Sheet” button to create a lower-level sheet. I assume all of the related sheets end up in a single eeschema file, is that correct? (I will be experimenting soon.)
Finally, that leads me to a suggestion: A hierarchy consists of both parents and children. If my statements above are correct, the current “Create Hierarchical Sheet” button can only create children, not parents, so the name of the button is a little misleading, perhaps it should be called “Create Child Sheet”. This would be more consistent with actual Kicad behavior and may be useful for the future when someday we can create parent or child sheets as needed and manage them within a project.