[ESS] simple questions

[Meinhard Ploner]

hi!
I'm sure these questions are answered by some manual, but it would be 
very fine not to search all ;-)

1) how can I open a new buffer for terminal commands as using svn or 
cp, ls, ...

2) how do I move in the current editing buffer up and down without the 
cursor is moved (I know C+l for similar effects).

3) I know how to change to the last buffer (C-x b) and to the buffer 
list (C-x C-b). But can I change directly to the 2nd last buffer or can 
I rotate through the buffers with shortcuts?

Thanks a lot!!

Meinhard