[R] showing available environment variables

[Gregor Gorjanc]

Karin Lagesen <karin.lagesen <at> medisin.uio.no> writes:
...
> The default program for reading files when using openVignettes on my
> system is ggv. ggv is broken. I would therefore like to use a
> different program, and I found the variable R_PDFVIEWER which should
> do the trick. However, so far no luck.
> 
> Therefore, how do I ask R what variables are available, and how do I
> get it to show what it is currently set to.

Try options(pdfviewer="something")

Gregor