Robert wrote:Fascinating idea. There'd still be a danger. Suppose I get confused about which Xy iteration I'm in. I make a change in foobar.txt in Xy1 then I scroll down and work in foobar.txt in Xy2. When I forget which Xy I'm in, and save foobar.txt in Xy2, it wipes out the changes earlier made in Xy1. The solution would be to flag when a change has been made and give a warning before a SAve or STore is done. Is that feasible?whenever you SAve any one document in any one iteration of Xy4, the same document is refreshed in all the other iterations of Xy4 (*if* that document is open in one of the iteration's nine "windows").Harry Binswanger hb@xxxxxxxx