You need the titlesec package in your preamble, and after that this command:
\titlelabel{\thetitle.\quad}
----- Original Message -----
From: "Ehud Kaplan" <ehud.kap...@mssm.edu>
To: "LyX User" <lyx-users@lists.lyx.org>
Sent: Tuesday, July 28, 2009 8:11 PM
Subject: Subheading numbering
> Is there a way to change the way Lyx/Latex numbers subheading, so that
> instead of
> 1 Introduction
> it sill produce: 1. Introduction?
> In other words, how do I produce a period following the last digit of a
> subheading number?
> Thanks,
>
