repeating previous command

[bb2 at duke.edu]

Hello All,

I was wondering if there is  way of cycling through a list of 
previously repeated commands in order to avoid having to retype them. 
If I open R outside of Xemacs, then the up or down arrows accomplish 
this.  Once I'm in the Xemacs environment with ESS (the iESS R 
window), the same up or down arrow simply moves my cursor within the 
R buffer.  How can I can I scroll through previous commands inside of 
the iESS window?

A more general problem...I would like to avoid emailing this list 
with such trivial questions, but I am stumped as to how to find these 
answers without doing so.  There does not seem to be a searchable 
archive of previously emailed questions or a user manual that I have 
found with this level of detail (where I could look up keywords such 
as history, previous command, etc).

Thanks again for your help,
Brian