[R-SIG-Mac] update graphics component without redrawing whole plot

[iuhz7j202 at sneakemail.com]

Yes, I guess I was was using 'device' imprecisely -- I'm not so familiar with the technicalities. Is it correct to say, then, that anything that uses 'grid' is an R device and will necessarily have to redraw to edit existing graphical elements?

I hadn't thought of using Tk. I've tinkered with it a little in the past on Mac OS with decent results. Thanks.

Peter