Initial style configuration is stored in a template document. A template has file extension .ott.
Your question reads in fact as “how can I customise my default template?”
- Start with a blank document
It contains all default styles
- Customise the desired styles
You can also add your user styles
- When done,
File
>Templates
>Save as Template
Tick the Set as default template box to make it your preferred template.
The new template is saved in a Writer-known directory. By default, this directory is buried deep in some hidden directory and this makes it unfriendly to update the template. See below for a workaround.
Your templates can be managed with File
>Templates
>Mange Templates
, notably if you want to designate another template as your default one without changing template contents.
As mentioned above, templates end up in a directory (you didn’t quote your OS name nor LO version, so I can’t be more descriptive). You can coerce LO to store them into your preferred user directory.
- Open
Tools
>Options
(if you’re under MacOS, this is Preferences
), LibreOffice
>Paths
- Select the *Templates` entry then Edit
- Press Add to add a new directory
- Optionally click the radio button in the list to designate your preferred default
- OK
-
OK to leave the options dialog