# baselinestretch outside of LaTeX preamble?

What is the difference, in LaTeX's head, between these two documents:

\documentclass{article}
\usepackage{lipsum}
\begin{document}
\renewcommand{\baselinestretch}{2.0}
\lipsum[2]
\end{document}


...and...

\documentclass{article}
\usepackage{lipsum}
\renewcommand{\baselinestretch}{2.0}
\begin{document}
\lipsum[2]
\end{document}


The first doesn't result in a double spaced document, I feel it should. Is it only possible to set \baselinestretch in the preamble, or can it be changed part way through a document?

(Note: I'm using the setspace package for double spacing, I'm curious mostly as to the behavior of \baselinestretch here...)

-

You just need to use \selectfont after you change \baselinestretch in the first example.