I can give that try. I kind of knew that SE supports the display buffer model. That was popular in older editors, Boxer DOS and Boxer TKO for example. I really liked the Boxer DOS editor in its day.
But, more often these days everyone seems to have migrated to tabbed documents (I guess this is the MDI interface?). This should be achievable in the MDI world also. The standard Microsoft implementation is quite hokey. You have to minimize all of the windows you are not using (so actually tabbed may not be MDI because they don't each have their own dialog boundary). After minimizing the ones that you don't want in the tile, then you activate the tile and the two files are tiled. This is ruined by the fact that all of the minimized files are using valuable screen space at the bottom. Microsoft apps already always annoyed me by not fixing this over the years.
An appropriate Microsoft example is available in Windows XP. If you have many applications open, you can hold down the Ctrl key and then left-click on two of the task bar icons, then right-click and select tile. Only those two applications will be tiled on screen.
So, I am really looking for something in the tabbed document interface that works like the XP example I provided.
Regards,
Jim