Are you wishing to open these documents in LO?;
LO probably will open them without any changes.
OR
Are you wishing to save previously made documents in LO for future
use?;
if so, then as you familiarize yourself with the menu options,
at the top, select the various settings.
[you could go on-line & read the manual pages; as for me, I
stick with the KIS method ]
Hoping this helps,