Marcelo Acuña wrote:
> I found in the TexLive distribution in my computer with linux several
> fonts. How I can to use it?
If these are "traditional" TeX fonts (i.e. Type1 fonts with TeX metrics), you
usually load them in the preamble by either loading a specific package, e.g.
\usepackage{xagaramon}
or by redefining the shapes, e.g.
\renewcommand{\rmdefault}{pmnj}
The correct procedure for a given font is usually described in the font's
documentation.
In LyX's font dialog, set the font to "Default" (although any other choice
won't harm either).
Jürgen
