Faq/Writer/034

When I enter text in lower-case, LibreOffice changes the first letter to a capital.
This behavior seeks to correct a sentence that you have forgotten to begin with a capital letter.

To remove this automatic correction:


 * select ;
 * near the top of the list, uncheck Capitalize first letter of every sentence; and
 * click OK to apply the changes.

To learn more about automatics, please, read this FAQ item 025 – These automatics annoy me!