LibO always creates documents based on a template.
If you create a new Writer document without explicitly choosing a template, either the previously defined default template is used, or -in case there is none- a built-in default template.
You can edit a template with settings you don’t like via >File>Templates>Edit Templates...
The template contains printer settings. If it’s the built-in default it may have settings you don’t like. Create a new empty Writer document then, choose the settings as you want them, and save the document as a template with extension .ott
.
Use >File>Templates>Manage Templates now, import your new custom template, and set it as default.
You can also use the template manager to set a different already existing template as your default.