I am using TeXShop on a Mac.
Sometimes, I wish to have two separate previews window for my output pdf so that I can look at, for example, page 23, when I edit page 12.
I know there is a small button on the upper right-hand side of preview window which can separate the PDF output into two parts, upper and lower. But what I want is to have two completely separate windows, so that I can put one in one screen and another one on my secondary screen.
Is there any way I can do it?