I want to set the settings permanently for all documents and I don’t need to repeat it
If you really expect help, edit your question to improve it. Mention your OS name and LO version. Remember also that any configuration or settings is guaranteed to be kept only if the document is saved as .odt.
Explain what you mean with “setting”. It can be understood as the configuration customisation you make on the application through Tools>Options. This is recorded in your user profile and should survive sessions and computer reboots.
It can also be understood as a personal formatting framework (font, page description, paragraph spacing, colours, …) you want to be automatically applied to all your (new) documents. You achieve this with a template.
More advice as soon as your question is more detailed.
As I understand it, you mean by configuring the app is to customize the user experience and that’s not required
What I said later is correct
When closing a program or document and then reopening a new document, what are the default settings?
It is clear to me that the situation remains as it was before the closure
But what is part of “the situation”:
I use a document to print small-labels, where front and back aligns on A6 paper.
Next I do is updating our manual. Should “the situation” inherit the A6-label-printer and my 100 page A4-manual be re-formatted to A6? Obviously not.
Next I have to check something from past archves. “the situation” assumed now everithing is unicode/utf-8. Sadly the folks creating this dbase-files didn’t know, so european umulauts and accents are barely recognizable (and I’m lucky: no need to print this double sided on A6).
Next I do an export for an external company. I know they need utf16 instead of utf8, so in your setting I change “the situation” to utf16, and have to remember to change back afterwards.
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All this inside one company. Assume I’d work as translator for several clients. “The situation” may be different on page-formatting, colour and language. So I prefer to have templates for files and “the situation” is changed by the file I load. Note you can also have hierarchical templates, wich update, when the master-template is changed.
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@anon87010807 already pointed to the help on the default-template, wich is used, when you create a new file. Note however: Windows uses another template for its own “shellNew” in explorer to create files (without opening LibreOffice).
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If this is mandatory for ALL documents, you will need to search for another program, as all your new settings will not be inherited by your pre-existing files.
I think you provided me with the solution, wait a little while to make sure, then I will confirm