To create a notebook whose options, when the notebook is opened, are fixed regardless of edits done to the notebook.
WindowSize -> Automatic and
WindowMargins -> 30 should be a starting value even if one has saved that notebook from full screen mode.
Notebooks are shared, e.g. through Google Drive, and opened on different devices. It is annoying to open a notebook, which was previously used with 250% magnification, taking half of 4K screen, on a 13" laptop.
Is there a good approach which is flexible, doesn't trigger dynamic warning and if possible works from a stylesheet?
I've thought that maybe something like
WindowSize -> Dynamic[dynamic, Initialization :> (dynamic = init)] where
init are references to specific
It won't work because notebook options are overwritten. Moreover,
Initialization can be triggered when the Kernel is restarted which is not desirable.
I have not received any answers so I'm moving tests I've done to an answer. I think they fit there and the goal is to reduce unanswered stack. But I will gladly accept any answer that fulfills all stated requirements.