How to duplicate a PCB layout in Kicad 5?

[SembazuruCDE]

@evalon

However, I have searched for the meaning of “multiple references” in the eeschema and I can’t find this described in the manual or elsewhere … I likely have missed it but can you briefly say what it means and how it is done in practice? Here I would have liked to upload a small example schematic but being a new member on this forum I cannot do so …

He is referring to hierarchical schematics. There is a section in the manual for hierarchical schematics. Also, there is another recent thread where I encouraged the OP to convert his schematic with 4 repeated sub circuits to a hierarchical schematic. See the second half of this post for my result (pdf only) and some notes I wrote about hierarchical schematics: (One of these days, I’ll actually spell “hierarchical” correctly an not rely on spell check to correct me. Apparently not even in this parenthetical…)

Arduino Scoreboard (upgrading)

Looks good. Just some points: In your table for segment A you incorrectly call out Drain0, should be Drain1 (RJ45 pin 8) Your bypass caps you have a value of “.1 uF”. I’ve found that if you don’t include the leading one’s place zero the decimal point can go unnoticed. Try instead to use “0.1 uF” to make it obvious that you mean a tenth of a microfarad, not one microfarad. For documentation purposes, and to make it easier to find the LED power net to assign it wider traces if you want, you may…

It also might be instructive to read over the full thread to see someone else’s design options and decisions (and I think he might have attached his project to the thread after he converted to hierarchical schematic to give you something to play with).

@evalon

In C:\users"my name"\ … there is a hidden file called “application data” but I can’t get access to this file either

You sure it is a file? It should be a folder, and named (in US-english localizations) “AppData”. The environmental variable %APPDATA% actually fully resolves to “C:\Users<user name>\AppData\Roaming”, but Microsoft doesn’t want normal people to access that file so it is hidden.
You would need to enable it in Windows using the “File Explorer Options”. Set the setting that I have my mouse pointer on in this screenshot:

@evalon

And they - just FYI - I will not be back to the forum for the next three days - i.e. not until Tuesday morning. Have a good weekend when to get to this point …

I hope your absence is for good things. In that spirit, I wish you an enjoyable weekend.