inserting external files: templates question

[Richard Brown]

Hello.
In the embedded objects manual, and in other places in documentation, I
find it written that I can include files in my lyx document by using
Insert > File> External Material and then choosing a template.

But all of the documentation says that available templates are chess,
date, lilypond, raster images, and pdf.

On my installation I don't have a template option for pdf: why would
that be, and how can I remedy it? I get allof the others, but no pdf