[R-SIG-Mac] Paging through the output to the Quartz display

[Richard Piper]

Is it possible to either page through the output to the Quartz  
device? Or alternatively, if there are multiple pages, require  
keyboard input
prior to the next graph being displayed.

If I remember is possible to do this on the windows version of R.  
Unfortunately, I don't seem to be able to work this one out under OSX.

thanks

Richard Piper