[R] three short questions

[javier garcia - CEBAS]

Hi all;

This is my first message to the list, and I've got three "basic" questions:

How could I insert comments in a file with commands to be used as source in R?

Is it possible to quickly display a window with all the colors available in 
colors()? How?

I'm displaying points, but they overlap, wether points() uses triangles, 
bullets or whatever. Is it possible to change (diminish) the size of the 
symbols? 

Thanks all,

Javier