If you want every new document to have user-defined settings, you must create a new template and set it as default.
- Create a new document, add or modify styles, and change other settings as you desire.
- From the File menu, choose Templates -> Save.
- Give the template a name.
- Select a category in the Categories list (for example, My Templates).
- Click OK to save the template.
- Choose File -> Templates -> Organize.
- In the Categories list, double-click on the My Templates folder.
- Right-click on the template you want to use and choose Set as Default Template from the menu.
- Click the Close button.
Do this for Writer & Calc