@cybereality I appreciate your effort.
However,
- I never asked if 3.x has or not support for multiple windows (I mentioned tab/window as possible use).
- I never asked if Godot 4.0 have a way to open docs in another window (I mentioned tab/window as possible use).
- I asked ->"Someone know where this setting is?"
Your (and others) answers game me info about new windows - that can be done without editor-settings -
instead of editor settings capability to manage docs' tabs/windows.
Some people know Godot feature without knowing what is inside editor-settings (where was my focus as you can see from my question)
Did you see the difference now? I'm not sure - some people are more likely to see similitude instead differences.
Thanks anyway. After some time I guessed the answer at this point.
As mentioned before @TwistedTwigleg was the one who come more close to the answer I need ( I was referring to Godot 3.x but it was close enough :) ) He is more focused in tasks for what I can see .
If this was a game probably he got the most score hehehe
edit.(off topic): I have to apologise again for my weird approach to problems. But I guess I'm quite close to this result that I got from personality test (that is not an excuse ofc but this is a fact nevertheless) :

I did because I felt the world was not made for me. A lot of things are wrong in the wrong place. I was in need of answers. And that was the result. I'm different :)
Yes, I have to admit it, day by day the feeling increase.
If the % of some section(I and J) was not so high maybe there was a way to me to be more common - among the rarest. But sadly its not the case.
Have fun in RL.