I use my computer for schoolwork mainly. Pages is the main word processor I use to type papers. I noticed split screen will not let you split between 2 documents within the same app. For instance, if I open a document in pages, start a new document, hold the split screen button on the first document to occupy the left half of the screen, the new, second document is not eligible to occupy the right half of the screen. Am I doing something wrong, is this a bug, oversight, or something the OS is incapable of? My computer is a Mid 2009 2.53 gHz MacBookPro with 8GB of ram and a 500GB hard drive.