Split Window (.uno:SplitWindow) is a function in Calc and it would be useful to have it in a similar fashion in writer. Presently to get a similar view in Writer is to duplicate a window of the same document ( Window > New Window ), but this duplicates the menubar, toolbars, sidebar and statusbar.
How it looks in MS Word - http://www.java2s.com/Tutorial/Microsoft-Office-Word-2007Images/Split_Windows___Then_Click_To_Split_Document.PNG
it sounds like a reasonable enhancement
*** This bug has been marked as a duplicate of bug 31481 ***