I have a page with a fretboard on it that contains some scales. There are three tabs for three different variations of these scales. If I put my mouse in the tab area and right click, one of my menu choices is "New Editor". This creates a new tab for me with the unexpected side effect of copying the fretboard from the prior page. OK, not what I would have expected, seems I should get a blank page or the dialog box for a new diagram page, but I'll work with this for now. Now here's the part that's baffling--any changes I make to the new fretboard seem to be echoed on the fretboard on the prior page from which it was copied. So I ended up destroying a diagram that I had previously created. I even created a third page this way and all three pages now seem to be linked. I'm not sure if this is a bug or a "feature," but if it's the latter it seems counter-intuitive and doesn't seem to server any real purpose as far as I can tell.