I was so excited about split-view on El Capitan until I realized it wasn’t compatible with my version of Word. Because of that, I’ve never been able to utilize it. I’m a grad student and really like to have my PDF readings on one side of the screen and my Word doc for note-taking on the other. For the longest time I was just adjusting the sizes manually until they were sort of half and half, but that got tedious. I’m so glad I decided to download this app after Googling “why does Word not support split-screen” for the thousandth time out of frustration. Thank you kind stranger on Reddit who posted about this app and how great it was!